Royal Australian Mint unveils “Swift and Sure–Centenary of Royal Australian Corps of Signals” Memorial Coin

The Royal Australian Mint has released a new coin to celebrate the Centenary of the Royal Australian Corps of Signals.

Image courtesy of the Royal Australian Mint.

The 2025 $1 uncirculated coin honors a century of dedicated service in military communications but also features a hidden message in Morse and binary code, challenging collectors and enthusiasts to decipher its secrets.

Since its establishment in 1925, the Royal Australian Corps of Signals has been vital in securing and relaying critical military communications, pioneering advancements in electronic warfare, cyber operations, and defense technology. This commemorative coin pays tribute to the thousands of men and women who have safeguarded Australia’s communications on the battlefield and beyond.

Designed by Mint artist Adam Ball, the coin is rich in symbolism. At its center stands Mercury, the Roman messenger god, reflecting the Corps’ motto of swift and sure communication. Mercury stands on a globe, symbolizing the Corps’ far-reaching impact. A wreath of leaves, reminiscent of the original Corps badge, encircles the design, while the background features Morse and binary code — a visual link between the Corps’ origins and its cutting-edge role in modern cyber warfare.

The coin's obverse features the effigy of His Majesty King Charles III, designed by Daniel Thorne.

Royal Australian Mint acting Chief Executive Officer Emily Martin expressed her excitement for this remarkable release and encouraged Australians to explore its hidden depths.

“Our latest $1 coin is cloaked in layers of secret code to mark the Centenary of the Royal Australian Corps of Signals, an organization that has been at the forefront of the Army’s technological evolution,” Ms. Martin said.

“Developing this coin was a really complex task – and there is also an interesting challenge for those who love puzzles and code-cracking!”

The Royal Australian Corps of Signals' Head of Corps, Brigadier Deane Limmer, thanked the Mint for marking this Centenary milestone in such a unique way.

“For 100 years, the men and women of the Royal Australian Corps of Signals have ensured that the Army remains connected, secure and ready for any challenge,” Brigadier Limmer said.

“As our currency has evolved from pounds and pence to dollars and cents, Army Signals have gone from trench warfare to electronic warfare; from semaphore to satellites and cyberspace.

“This commemorative coin is a fitting tribute to their dedication, innovation and service and we are honored by this recognition.”

The 2025 $1 Uncirculated Coin “Swift and Sure––Centenary of Royal Australian Corps of Signals” is available from the Royal Australian Mint for $17.50. It can be purchased through the following channels: