The twelve-sided Australian fifty-cent coin is the third-highest denomination coin of the australian dollar and the largest in terms of size in circulation. It is equal in size and form to the Cook Island $ 5 coin, and both remain to be the only 12-sided coins in the southern hemisphere. It was introduced in 1969 [ 3 ] to replace the orotund fifty-cent mint issued in 1966. The original, attack, 50-cent mint was made of 80 % flatware and 20 % copper ; but as the value of a free-floating silver price became higher, the coin ‘s bullion value became more valuable than its confront value ; so that translation was withdrawn from circulation and replaced with the dodecagonal cupro-nickel version.
It is by diameter the largest australian coin presently issued and second largest after the Crown of 1937–38. It is besides the heaviest australian mint in common circulation. many commemorative designs have been issued, the large size allowing for detail content. With a diameter of 31.65 millimeter ( 1.25 in ) across flats, [ 1 ] the 50-cent coin is one of the largest in bulk among those presently circulating in the universe. Coins of larger diameter include the rib Rican five-hundred- colones and the fifty- CFP Franc, both 32.9 millimeter. The 1986, 1987, 1989, 1990, 1992, year dated 50c are only available in mint and proof sets, with the exception of the 1967 and 1968, as no mint/proof sets exist for those years and there were no circulation strikes produced either. Five-cent, ten-cent, twenty-cent, and fifty-cent coins are legal attendant up to the total of $ 5. [ 4 ]
obverse [edit ]
As with all coins of Australia, the reigning sovereign features on the obverse. merely Elizabeth II has been monarch during the mint ‘s universe.
Unlike early decimal denominations, five different portraits of the queen have been used on 50c coins. A singular effigy by Vladimir Gottwald was used for the 2000 Royal Visit commemorative fifty-cent musical composition. [ 5 ] [ 6 ] This is the only australian decimal coin to have an obverse designed by an australian [ 7 ] and to have a portrait of the tabby which is not besides used on british currency. The other four portraits have featured on all then-current denominations : from 1966 to 1984 one by Arnold Machin, [ 8 ] from 1985 to 1998 one by Raphael Maklouf, [ 9 ] from 1999 to 2019 a portrait by Ian Rank-Broadley, [ 10 ] and since 2019 a portrait by Jody Clark. These portraits were introduced to british coins in 1968, 1985, 1998, and 2015 respectively. [ 11 ]
commemorative coins [edit ]
The australian fifty-cent mint was the first to display a magnetic declination of the inverse purpose in 1970 for the commemorating the bicentennial of Lieutenant James Cook ‘s landing in Australia. Various early designs followed until the one-dollar and twenty-cent besides included newly designs .