Australian 1 oz Silver Bullion Coins and Rounds. In 1971, the British pound sterling divided into shillings and pence, with additional half-crowns and crown coins. Australia used the same denominational system, with one unique addition: the fifty-cent piece in 1966, which was the only non-commemorative Australian coin to contain silver.Silver silver silver australian silver coins. Sent with Australia Post Standard Small Box/Satchel. Threepence 1912 1952 1956 1950 1922 1921 1939. Sixpences 1958 x2 1950 1945 x2 1943. Shillings 1959 1955 1952 1953 1950 . Florin 1927 x3 1957 1959 1951 . Round 50 cent x4 Thinkorswim ondemand not working.