The Royal Signals Cap Badge: History, Symbolism and Meaning

The Royal Signals Cap Badge: History, Symbolism and Meaning

Introduction

The Royal Signals cap badge is one of the most distinctive British Army cap badges — a figure of Mercury, the messenger of the gods, standing on a globe, surrounded by a laurel wreath, and bearing the motto Certa Cito: Swift and Sure. It is a badge that encodes, in a single image, the identity and mission of the British Army’s specialist communications corps: speed, reliability, and the transmission of information that makes military command possible.

This guide explores the origins of the Royal Corps of Signals and its cap badge, the history and symbolism of each element, the Corps’ operational record across more than a century of service, and what collectors should know when seeking an original or licensed example of this remarkable piece of British military heritage.

About This Guide

This article has been researched and written by Precision Military Emblems, a specialist producer of officially licensed British military emblems and museum-style heritage displays. Every article in our Military Heritage series is created to museum standards of research, drawing on primary sources, regimental histories, official records and authoritative secondary sources to preserve the stories, symbolism and traditions behind Britain’s regiments and corps. The same commitment to historical accuracy that informs every article also informs every officially licensed emblem and display we produce.

Precision Military Emblems holds official Ministry of Defence licences to produce emblems and heritage displays for a growing range of British Army regiments and corps. Our products are not generic reproductions — they are the result of the same depth of research you are reading now, translated into officially licensed, museum-style heritage displays designed to help collectors, veterans, serving personnel, families and future generations celebrate Britain’s military heritage with confidence.

At Precision Military Emblems, we believe every British military emblem tells a story. Behind each cap badge lies a history of service, sacrifice, courage and regimental pride. Our mission is to preserve those stories through meticulous historical research and officially licensed museum-style heritage displays that honour Britain’s Armed Forces for generations to come.

Unlike many retailers, we don’t simply reproduce military emblems — we research, interpret and preserve the history behind them, ensuring every officially licensed product is built upon the same commitment to historical accuracy found throughout our Military Heritage series.

Did You Know?

The figure of Mercury on the Royal Signals cap badge is affectionately known as Jimmy — one of the most recognisable nicknames in the British Army. The exact origin of the name remains uncertain, but the affection with which Royal Signals personnel regard their Corps emblem is not.

Who Are the Royal Signals?

The Royal Corps of Signals is the British Army’s specialist communications corps, responsible for providing the command, control, communications, and information systems that enable military operations at every level. From the regimental radio operator in a forward position to the strategic communications networks that connect commanders across a theatre of war, Royal Signals personnel — known as Scaleybacks — are the backbone of the Army’s ability to command and coordinate its forces.

The Corps traces its origins to the Royal Engineers, within which military communications developed as a specialist discipline during the nineteenth and early twentieth centuries. The experience of the First World War — in which the rapid, reliable transmission of orders and intelligence proved decisive — demonstrated beyond doubt that communications required its own dedicated corps. The Royal Corps of Signals was established as an independent corps on 28 June 1920, by Royal Warrant of King George V, separating from the Royal Engineers to become a corps in its own right.

Since its formation, the Royal Corps of Signals has served in every major British military operation, adapting continuously to the evolving demands of military technology — from field telephone exchanges and wireless telegraphy to satellite communications, electronic warfare, and cyber operations.

A Century of Service: Key Dates

Year Event
1870 Telegraph units established within the Royal Engineers; military communications begin to develop as a specialist discipline.
1914–1918 First World War; Royal Engineers Signal Service provides communications across every theatre, demonstrating the critical importance of dedicated military communications.
1920 Royal Corps of Signals established as an independent corps by Royal Warrant of King George V, 28 June 1920.
1939–1945 Second World War; Royal Signals serves in every theatre from North Africa and Italy to north-west Europe and the Far East, providing communications for the largest British military operations in history.
1945–1990 Cold War; Royal Signals forms a key part of the British Army of the Rhine (BAOR), providing the communications infrastructure for NATO’s defence of Western Europe.
1969–2007 Operation BANNER; Royal Signals provides communications support throughout the British Army’s longest continuous operational deployment in Northern Ireland.
1982 Falklands War; Royal Signals provides communications in a demanding South Atlantic environment, often improvising solutions under operational conditions.
1991 Gulf War (Operation GRANBY); Royal Signals provides communications for the largest British military operation since the Second World War.
2003–2009 Operations in Iraq; Royal Signals provides communications and information systems support throughout the campaign.
2001–2014 Operations in Afghanistan; Royal Signals serves throughout, providing tactical and strategic communications in a complex and demanding operational environment.
2022 King’s Crown (heraldically, the Tudor Crown) reintroduced to the cap badge following the accession of King Charles III.

Origins of the Royal Signals Cap Badge

The Royal Signals cap badge is dominated by one of the most distinctive figures in British military insignia: Mercury, the messenger of the gods, standing on a globe. The choice of Mercury as the Corps’ emblem was deliberate and apt — in classical mythology, Mercury (Hermes in Greek tradition) was the divine messenger, associated with speed, communication, and the transmission of information between gods and mortals. No symbol more perfectly captures the role of a military communications corps.

The badge has remained instantly recognisable since the Corps was established in 1920, a testament to the enduring aptness of its symbolism — notwithstanding the crown and manufacturing variations that collectors will encounter across different periods of production. Every officially licensed emblem and museum-style heritage display we create begins with the same meticulous historical research that underpins our Military Heritage series, ensuring historical accuracy is preserved from the written history through to the finished display.

Why Mercury? The Symbolism Behind the Choice

The selection of Mercury as the emblem of a military communications corps was not merely decorative — it was a considered choice rooted in the specific qualities that Mercury represented in classical tradition, and that military communications demanded in practice.

Speed. Mercury was the swiftest of the gods, depicted with winged sandals and a winged helmet that allowed him to travel between the divine and mortal worlds in an instant. For a communications corps whose fundamental purpose is the rapid transmission of orders and intelligence, speed is not a virtue — it is a requirement. A message that arrives too late is useless; Mercury embodied the urgency that military communications demands.

Reliability and intelligence. Mercury was not merely fast — he was trusted. The gods entrusted him with their most important messages, confident that he would deliver them accurately and without distortion. Military communications demands the same quality: information must arrive not only quickly but correctly. Mercury’s role as a faithful and intelligent messenger made him an apt symbol for a corps whose work underpins the accuracy of military command.

Movement and reach. Mercury moved freely between worlds — between Olympus and the mortal realm, between the living and the dead. This freedom of movement, this ability to operate across boundaries and environments, reflects the Royal Signals’ mission to provide communications wherever the British Army operates: in the field, at sea, in the air, and increasingly in the digital and cyber domains.

Communication as power. In classical mythology, the ability to communicate — to transmit the will of the gods — was itself a form of power. Without Mercury, the gods could not coordinate their actions. Without the Royal Signals, the British Army cannot command its forces. The symbolism is clear, and it is why Mercury has remained the Corps’ emblem for more than a century.

The Royal Signals Cap Badge: Design and Elements

The Royal Signals cap badge — affectionately known as Jimmy after the figure of Mercury at its centre — is a composition of carefully chosen elements that together express the Corps’ identity, role, and values.

Mercury (Jimmy) and the Origin of the Nickname

The figure of Mercury stands at the centre of the badge, posed in the classical manner with one arm raised and winged sandals on his feet. In Roman mythology, Mercury was the messenger of the gods — swift, reliable, and essential to the communication of divine will. On the Royal Signals badge, Mercury represents the Corps’ fundamental mission: the rapid, reliable transmission of information that enables military command and control.

The nickname Jimmy reflects the affection with which Royal Signals personnel regard their Corps emblem — but the exact origin of the name remains uncertain. Several explanations have been suggested over the years: some attribute it to a corruption of a foreign word encountered during early overseas service; others suggest it derives from a common soldier’s habit of giving familiar names to regimental figures and mascots; still others point to specific individuals or incidents in the Corps’ early history. No single account has been universally accepted, and the true origin may never be definitively established. What is certain is that Jimmy has become an enduring and affectionate term for the Mercury figure, the cap badge, and — by extension — the Royal Corps of Signals itself.

The Globe

Mercury stands on a globe, representing the worldwide reach of Royal Signals operations. From the Western Front in 1914–18 to operations in the Falklands, the Gulf, Bosnia, Iraq, and Afghanistan, Royal Signals personnel have provided communications support wherever the British Army has served. The globe is a direct statement of that global commitment.

The Laurel Wreath

Encircling the badge is a laurel wreath, the traditional symbol of military honour and achievement. The wreath reflects the Royal Signals’ distinguished service record across more than a century of military operations.

The Motto: Certa Cito

The motto of the Royal Corps of Signals is Certa Cito — Latin for Swift and Sure. The motto captures the two essential qualities of military communications: speed and reliability. A message that arrives too late is useless; a message that arrives quickly but inaccurately is dangerous. Certa Cito expresses the Corps’ commitment to delivering both qualities simultaneously, under any conditions.

Crown Variations

As with all British Army cap badges, the form of the Crown on the Royal Signals badge reflects the reigning monarch at the time of manufacture — and for collectors, identifying the correct crown pattern is one of the most reliable tools for dating a badge.

Badges produced during the reigns of King George V, King George VI and King Charles III are universally known to collectors and veterans as the King’s Crown. The heraldically correct name for this crown pattern is the Tudor Crown — a closed imperial crown with alternating crosses patée and fleurs-de-lis on the circlet, and a distinctive arched form that has been used in British military heraldry for centuries. Collectors and veterans almost universally refer to it simply as the King’s Crown, and that familiar term is used throughout this article; Tudor Crown is the precise heraldic name for the same form.

Following the accession of Queen Elizabeth II in 1952, the badge was updated to display a different crown pattern, universally known to collectors and veterans as the Queen’s Crown. The heraldically correct name for this pattern is St Edward’s Crown — a more rounded, cushion-shaped crown with a distinctive profile that differs visibly from the Tudor Crown used under the Kings. This version was worn from 1952 until Queen Elizabeth II’s death in 2022. The current badge, introduced following the accession of King Charles III, returns to the Tudor Crown — the King’s Crown — pattern. Minor variations in the execution of both crown forms may be encountered between manufacturers and production periods, but the overall pattern remains consistent within each reign.

Operational Legacy: A Century of Communications

The Royal Corps of Signals has served in every major British military operation since its formation in 1920 — and its predecessor, the Royal Engineers Signal Service, served throughout the First World War. The Corps’ history is inseparable from the history of the British Army itself.

The First World War: The Case for a Dedicated Corps

Although the Royal Corps of Signals was not formally established until 1920, its origins lie in the experience of the First World War (1914–1918). The Royal Engineers Signal Service provided communications across every theatre of the war — from the Western Front to Gallipoli, Mesopotamia, and East Africa — operating field telephone exchanges, laying cable under fire, and maintaining the wireless links that connected commanders to their formations. The scale and complexity of communications required by industrial-scale warfare demonstrated beyond doubt that a dedicated communications corps was essential. The lessons of 1914–18 directly shaped the decision to establish the Royal Corps of Signals as an independent corps in 1920.

The Second World War

The Second World War (1939–1945) saw the Royal Signals serve in every theatre of operations — from the Western Desert and Italy to north-west Europe, the Far East, and beyond. Royal Signals units provided the communications infrastructure for every major British offensive, from El Alamein to the Rhine crossing, operating under conditions of extreme difficulty and danger. The Corps expanded enormously during the war, and the experience of providing communications for the largest British military operations in history shaped the Corps’ doctrine and organisation for decades afterwards. Royal Signals personnel worked in close coordination with armoured formations — including the Royal Tank Regiment — whose ability to manoeuvre and strike depended entirely on the communications links that Royal Signals maintained under fire.

The Cold War and the British Army of the Rhine

During the Cold War, the Royal Signals formed a key part of the British Army of the Rhine (BAOR), providing the communications infrastructure for NATO’s defence of Western Europe. Royal Signals units maintained the secure voice and data links that connected British and NATO commanders, operated the field communications systems that would have been essential in the event of a Warsaw Pact offensive, and continuously adapted their capabilities to the evolving demands of electronic warfare and signals intelligence. The Cold War period also saw the Corps serve in Northern Ireland throughout Operation BANNER (1969–2007) — the British Army’s longest continuous operational deployment — providing communications support in a complex and sensitive operational environment. Throughout this period, Royal Signals worked alongside the Royal Electrical and Mechanical Engineers (REME), whose engineers kept the communications equipment and vehicles of the BAOR operational.

The Falklands and the Gulf War

The Falklands War (1982) presented the Royal Signals with one of its most demanding operational challenges: providing reliable communications across thousands of miles of ocean and in the harsh conditions of the South Atlantic. Royal Signals personnel improvised solutions under operational conditions, maintaining the links between the Task Force and the United Kingdom that were essential to the conduct of the campaign. In the Gulf War (1991), the Corps provided communications for the largest British military operation since the Second World War, supporting Operation GRANBY as part of the Coalition force that liberated Kuwait.

Iraq and Afghanistan

In the early twenty-first century, the Royal Signals served throughout the British campaigns in Iraq (2003–2009) and Afghanistan (2001–2014), providing tactical and strategic communications in complex and demanding operational environments. The Corps adapted rapidly to the demands of counter-insurgency operations, integrating new digital communications technologies with established field communications practices to support British forces across both theatres. Royal Signals personnel worked alongside the Royal Army Physical Training Corps, whose instructors maintained the physical readiness of soldiers operating in the extreme conditions of both campaigns.

The Royal Signals Today

Today, the Royal Corps of Signals remains the British Army’s specialist communications and information systems corps, but its role has expanded far beyond the field telephone exchanges and wireless sets of its early years. The modern Corps operates across the full spectrum of communications and information technology, providing the Army with capabilities that are essential to every aspect of contemporary military operations.

Current Royal Signals capabilities include tactical communications systems that provide secure voice and data links at every level of command; satellite communications that connect deployed forces to strategic headquarters and national command authorities; electronic warfare support, including the detection, analysis, and exploitation of enemy electronic emissions; information systems that underpin the Army’s digital battle management and logistics networks; and a growing cyber capability that reflects the increasing importance of the digital domain in modern warfare. The Corps also provides the communications infrastructure for digital battle management systems such as the Morpheus programme, which is transforming the way the British Army shares information and coordinates its operations.

Although the Royal Signals now operates digital networks, satellite communications and cyber capabilities unimaginable in 1920, Mercury remains the perfect symbol of rapid and reliable communication — preserving an unbroken visual link between today’s cyber and satellite specialists and the cable-layers and wireless operators who served on the Western Front more than a century ago.

Collecting the Royal Signals Cap Badge

The Royal Signals cap badge is among the most distinctive pieces of British military insignia, valued by collectors for its unique design — the figure of Mercury is unlike any other element found on British cap badges — and for its association with a corps that has served in every major British military operation of the past century. Crown variations — reflecting the transition from Queen’s Crown (St Edward’s Crown) to King’s Crown (Tudor Crown) following the accession of King Charles III in 2022 — add a further dimension of collector interest, allowing badges to be associated with specific reigns and periods of service. At Precision Military Emblems, our research into Royal Signals insignia informs both our Military Heritage articles and the design of our officially licensed heritage displays — ensuring that every product we produce is built upon the same historical accuracy we apply to our writing.

Collectors of British military insignia often find that specialist corps badges — such as the Royal Signals, the REME, and the Royal Army Physical Training Corps — reward deeper research than regimental badges, given the additional layers of crown variations and institutional evolution that distinguish individual examples.

King’s Crown Badges (Tudor Crown)

Badges produced during the reigns of King George V (1910–1936), King George VI (1936–1952) and King Charles III (2022–present) are known to collectors and veterans as King’s Crown badges. The heraldically correct name for this crown pattern is the Tudor Crown — the form used in British military heraldry under all reigning kings. The Corps was established in 1920 during the reign of George V, meaning the earliest Royal Signals badges are King’s Crown (Tudor Crown) examples. George V and George VI era King’s Crown badges are particularly sought after, especially those with documented provenance linking them to named soldiers or specific campaigns.

Queen’s Crown Badges (St Edward’s Crown)

The majority of Royal Signals cap badges encountered by collectors will be Queen’s Crown versions, produced between 1952 and 2022 during the reign of Queen Elizabeth II. The heraldically correct name for this crown pattern is St Edward’s Crown — a more rounded, cushion-shaped form that is visibly distinct from the Tudor Crown used under the Kings. Collectors and veterans refer to it universally as the Queen’s Crown, and that familiar term is used throughout this article. Within this broad category, collectors should look for variations in construction method, metal composition and maker’s marks that can help establish the period of manufacture more precisely. From the late 1950s onwards, Staybrite anodised aluminium badges were introduced as a more practical alternative for everyday wear.

Staybrite Badges

Staybrite anodised aluminium badges were introduced across the British Army from the late 1950s as a low-maintenance alternative to brass and gilded metal badges. Royal Signals Staybrite badges are widely available to collectors and represent an affordable entry point into the collecting field. They are typically lighter than their brass counterparts and have a distinctive bright, silvery finish.

Officers’ Badges

As with other British Army corps, officers’ Royal Signals cap badges were typically produced to a higher standard than other-ranks’ badges, often in silver or silver plate with finer detail and higher quality construction. Officers’ badges are among the most desirable items for serious collectors and command a premium at specialist militaria auctions.

Recognised Manufacturers and Maker’s Marks

Recognised manufacturers of Royal Signals cap badges include J.R. Gaunt & Son of London and Birmingham, and Firmin & Sons of London — both long-established suppliers of British Army insignia whose marks are widely regarded as reliable indicators of quality and authenticity. Maker’s marks are typically found on the reverse of the badge, either stamped into the metal or on a small label.

Provenance is the single most important factor in determining the value of an original Royal Signals cap badge. A badge accompanied by service records, a soldier’s photograph, or other documentation that establishes its history tells a far richer story than the insignia alone. Collectors should examine the reverse of any badge carefully for maker’s marks, fitting types and construction details that help confirm authenticity and establish the period of manufacture. When in doubt, consult a specialist militaria dealer or auction house with experience in British military insignia.

Displaying the Royal Signals Cap Badge

Whether displaying an original period badge or a heritage display inspired by the Royal Signals’ insignia, correct preservation and presentation are essential to ensure that the badge can be appreciated by future generations. Museum-style display frames incorporating UV-protective acrylic or conservation-grade glazing and acid-free mounting materials offer the best protection for displayed badges. Badges should be kept in a stable environment, away from direct sunlight and significant fluctuations in temperature and humidity. Original period badges should always be handled with clean cotton gloves to prevent damage from the oils and acids present in human skin.

Many collectors choose to display their Royal Signals badge alongside service medals, photographs and other memorabilia, creating a comprehensive tribute to an individual’s military service that tells the full story of their career in the Corps. Precision Military Emblems produces dedicated Royal Signals heritage display frames purpose-built to present the Royal Signals emblem alongside medals and service photographs — each one designed with the same attention to historical accuracy that informs our research.

Frequently Asked Questions

Why is Mercury on the Royal Signals cap badge?

Mercury was chosen as the emblem of the Royal Corps of Signals because he embodied the qualities that military communications demands: speed, reliability, intelligence, and freedom of movement. In classical mythology, Mercury was the messenger of the gods — swift, trusted, and capable of operating across any boundary. These qualities made him the ideal symbol for a corps whose mission is the rapid and reliable transmission of information that enables military command and control.

What does Certa Cito mean?

Certa Cito is a Latin phrase meaning Swift and Sure. It is the motto of the Royal Corps of Signals, capturing the two essential qualities of military communications: speed and reliability. A message that arrives too late is useless; a message that arrives quickly but inaccurately is dangerous. Certa Cito expresses the Corps’ commitment to delivering both qualities simultaneously, under any conditions.

Why is Mercury called Jimmy?

The exact origin of the nickname Jimmy remains uncertain. Several explanations have been suggested over the years — some attribute it to a corruption of a foreign word, others to the British soldier’s tradition of giving familiar names to regimental figures, and others to specific incidents in the Corps’ early history. No single account has been universally accepted. What is certain is that Jimmy has become an enduring and affectionate term for the Mercury figure, the cap badge, and the Royal Corps of Signals itself.

What is the difference between King’s Crown and Queen’s Crown Royal Signals badges?

Badges produced during the reigns of King George V, King George VI and King Charles III are known to collectors and veterans as King’s Crown badges. The heraldically correct name for this crown pattern is the Tudor Crown — a closed imperial crown with a distinctive arched form that has been used in British military heraldry for centuries. Badges produced during the reign of Queen Elizabeth II (1952–2022) are known as Queen’s Crown badges; the heraldically correct name for this pattern is St Edward’s Crown, a more rounded, cushion-shaped form that is visibly distinct from the Tudor Crown. Collectors and veterans refer to both patterns by the familiar King’s Crown and Queen’s Crown terms, and those are the names used throughout this article. The current badge, introduced following the accession of King Charles III in 2022, returns to the Tudor Crown — the King’s Crown — pattern.

Are Royal Signals cap badges rare?

Queen’s Crown (St Edward’s Crown) Royal Signals badges, produced between 1952 and 2022, are relatively available to collectors. King’s Crown (Tudor Crown) badges from the George V and George VI eras are considerably rarer and are particularly sought after, as they represent the earliest period of the Corps’ existence. Officers’ badges in silver or silver plate are also scarce and command a premium at specialist militaria auctions.

How can I tell if a Royal Signals cap badge is genuine?

Key indicators of a genuine period badge include appropriate wear patterns consistent with actual use, period-correct construction methods, correct weight and metal composition, and maker’s marks from recognised manufacturers such as J.R. Gaunt & Son or Firmin & Sons. The form of the Royal Crown — King’s Crown (Tudor Crown) or Queen’s Crown (St Edward’s Crown) — helps establish the period of manufacture. Provenance documentation significantly enhances both authenticity and value. When in doubt, consult a specialist militaria dealer or the Royal Signals Museum.

The Royal Signals’ Enduring Legacy

The Royal Corps of Signals has served the British Army for more than a century, from the cable-layers of the Western Front to the cyber specialists of the modern digital battlefield. Its cap badge — bearing the figure of Mercury, the globe of worldwide service, the laurel wreath of military honour, and the motto Certa Cito — is one of the most distinctive and immediately recognisable pieces of British military insignia ever produced.

For veterans of the Corps, it is a permanent reminder of their service and their comrades. For collectors, it is a unique piece of British military heritage. For all who encounter it, it is a testament to the men and women who have kept the British Army connected — swiftly and surely — for more than a hundred years.

Further Reading

For those wishing to explore the history of the Royal Corps of Signals and its cap badge in greater depth, the following authoritative sources provide reliable and detailed information.

  • Royal Signals Museum — The official museum of the Royal Corps of Signals, located at Blandford Camp, Dorset. Holds extensive collections of Royal Signals insignia, equipment, and archives.

  • Royal Signals Association — The official association supporting Royal Signals veterans and preserving the Corps’ heritage and traditions.

  • National Army Museum — Authoritative collections and research resources covering the history of the British Army, including the Royal Corps of Signals.

  • Imperial War Museums — Comprehensive collections and research resources covering the First and Second World Wars, including the Royal Signals’ contribution to both conflicts.

  • The National Archives — The official archive of the UK government, holding primary source documents including war diaries and regimental papers relating to the Royal Corps of Signals.

Officially Licensed Royal Signals Emblems & Heritage Displays

The history you have just read — from the cable-layers of the Western Front to the cyber specialists of today — is the history that Precision Military Emblems exists to honour. Every officially licensed emblem and heritage display we produce begins with exactly this kind of research: cross-referenced against regimental histories, museum collections, official records and authoritative secondary sources. Our products are not inspired by a general interest in military heritage — they are built upon the same meticulous historical research that underpins every article in our Military Heritage series.

Every product is produced under official MOD licence, ensuring that each piece meets the standards required to carry the Royal Corps of Signals’ insignia. Whether you are commemorating your own service, preserving a family member’s military history, or adding to a collection of British military heritage, our museum-style heritage displays are purpose-designed to present the Royal Signals emblem alongside medals and service photographs as a lasting tribute to a remarkable corps.

About Precision Military Emblems

Precision Military Emblems holds official Ministry of Defence licences to produce British military emblems and museum-style heritage displays for a growing range of regiments and corps. We specialise in researching, interpreting and preserving Britain’s military heritage through officially licensed emblems and museum-style heritage displays — and every product we produce is built upon the same meticulous historical research you have been reading. Every emblem and display is cross-referenced against regimental histories, museum collections and official records to ensure historical accuracy in every detail.

At Precision Military Emblems, we believe Britain’s military heritage deserves to be understood, preserved and celebrated. Through meticulous historical research and officially licensed museum-style heritage displays, we are proud to help ensure the stories behind Britain’s regiments and corps continue to inspire future generations.

You may also enjoy our articles on the Royal Tank Regiment Cap Badge: History, Symbolism and Meaning, the REME Cap Badge: History, Symbolism and Meaning and the Royal Army Physical Training Corps Cap Badge: History, Symbolism and Meaning.

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