Celebrate a century of military communication with the 2025 $1 Centenary of Royal Australian Corps of Signals PNC, a special release from Australia Post featuring a $1 coin from the Royal Australian Mint. Commemorating 100 years of the corps’ service from 1925 to 2025, this Postal Numismatic Cover combines a finely struck uncirculated coin with a postmarked envelope, making it a top choice for collectors passionate about Australia’s military history.

The $1 aluminium bronze coin, designed by A. Ball, features a striking reverse with a symbolic figure holding a caduceus and lightning bolt, standing on a globe with binary code, embodying the corps’ motto "Certa Cito" (Swift and Sure), while the obverse displays King Charles III’s effigy. The envelope captures the corps’ evolution—from early signalers to modern tech—with a 2025 postmark and the corps’ emblem, creating a fitting tribute to a century of service that’s perfect for any collection.