Years. Face Value. Metals. Grades. Prices. Mints Coin, Australia, Elizabeth II, 20 Cents, 1967, VF(20-25), Copper-nickel, KM:66. #528308. Coin Year: 1980. The twenty cent coin was first introduced with decimal currency on 14 All twenty cent coins in the first issue in 1966 were produced at the Royal Mint, London. 1980. 1981. 1981. 1981. 1982. 1983. 1984. 1985. 30.0. 28.2. 83.8. 40.5. 16.5. Physical Description. A cupro-nickel coin (28.5 mm diameter with milled edge) featuring on the obverse a diademed bust of Elizabeth II facing right; around.

1980 australian 20 cent coin value - and