Australian twenty-cent coin Australian twenty-cent coin The Australian twenty-cent coin of the Australian decimal currency system was issued with conversion to decimal currency on 14 February 1966, replacing the florin which was worth two shillings – a tenth of a pound. (The Australian pound was converted to two Australian dollars.) To date, three different obverse face designs have been used: from 1966 to 1984, the head of Queen Elizabeth II by Arnold Machin; from 1985 to 1998, the head by Raphael Maklouf; and since 1999, the head by Ian Rank-Broadley. The obverse has the inscription AUSTRALIA and the year-of-issue on the right hand
Penny (Irish pre-decimal coin) copper, 3% tin and 1.5% zinc. Its dimensions were the same as that of the British penny as both currencies were pegged until 1979. The reverse of the penny was designed by the English artist Percy Metcalfe. It featured a hen and five chicks and the coin's Irish name. The obverse featured the Irish harp. From 1928 to 1937 the date was split either side of the harp with the name "Saorstát Éireann" circling around. From 1938 to 1968 the inscription changed to "Éire" on the left of the harp and the date on the right. Penny (Irish pre-decimal coin)