5 Dollars - Leonard I Silent Service

Hutt River Province, the micronation founded by Leonard Casley in 1970 after a dispute with the Western Australian government over wheat quotas, issued coins primarily as collectibles and revenue instruments rather than circulating currency. The "Silent Service" title almost certainly references submarine warfare commemoration — a recurring theme in late Cold War-era micronational and Pacific island collector coinage, where licensing deals with outside minting agencies drove the subject matter more than any local connection.

Casley, who styled himself Prince Leonard I, maintained Hutt River's claimed sovereignty for fifty years until dissolving it in 2020 under tax debt pressure.