100 Dollars - Leonard I Skylab

Hutt River Province declared independence from Western Australia in 1970 after a wheat quota dispute, and Leonard Casley — styling himself Prince Leonard I — spent the following decade building out a full coinage program to reinforce the claim. This 1979 gold issue is part of that effort, struck privately rather than by any national mint, with the Skylab theme capitalizing on the space station's uncontrolled re-entry and partial crash landing on Australian soil in July 1979. The timing was deliberate; few news events that year put "Australia" in international headlines more reliably.