Struck for just one year, the 1966 Silver Round is Australia's first 50c - and the nation's only issued precious metal decimal coin. This coin was the initially intended design for the fifty cent. However the price of silver in the market went up and this coin still had a content of 80% Silver. The Royal Australian Mint quickly realized the change in market dynamic on the materials to produce the coin, therefore they recalled it and attempted remove as many as they could from circulation. To the lucky collectors they can still be found. Or purchased in this fine uncirculated grade right here.