The 1855 Sydney Mint Sovereign featuring a filleted bust of Queen Victoria designed by James Wyon. The coin is the nation's first sovereign and the first coin of the realm minted at an overseas branch of the Royal Mint London. The portrait only ran for two years, 1855 and 1856.
The 1855 Sydney Mint Sovereign reverse designed by L. C. Wyon was based loosely around contemporary reverse designs of the British Sixpence and Shilling. Its strong point of difference to the British coins, the inclusion of the words 'AUSTRALIA' AND 'SYDNEY MINT'. The design lasted until 1870.