1911-1963 All sixpence coins in this period were as follows.
Diameter 19 mm
Weight 2.83 grams
Edge – Milled
Composition: 92.5 silver, 7,5% copper
Obverse: Has a portrait of King George V by Sir E.B. Mackennel
Reverse: From 1910 to 1963 the Australian coat of arms.by W.H.J. Blakemore was on the reverse.
The Australian Sixpence was a coin used in the Commonwealth of Australia prior to decimalisation. It was minted from 1910 until 1963, excluding 1913, 1915, 1929–33 inclusive, 1937, 1947 and 1949. After decimalisation on 14 February 1966, it continued to circulate at the value of 5¢, along with new 5¢ coins of the same size and weight.
During World War II, between 1942 – 1944, sixpence production was supplemented by coinage produced by two branches of the United States Mint. Coins struck at the San Francisco mint (1942-1944) carry a small S below the coat of arms, while those from the Denver mint (1942-1943) have a small D in the same place.
From 1910 to 1945 Australian sixpences were of sterling silver (0.925 fine); from 1946 to 1963 they were reduced to 0.500 fine.
There were in total 6 varites of Six Pence coins minted between 1911 and 1966 when decimalisation occured.
Mints: M – Melbourne S – Sydney L – London S – San Francisco D – Denver