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
Farthing (Irish coin) Farthing (Irish coin) The farthing (d) () was the lowest value coin of the pre-decimal Irish pound, worth a quarter of a penny, of a shilling or of a pound. The coin had lost much of its value through inflation long before decimalisation in 1971, and during the 1960s no farthings were produced for general circulation; those minted in 1966 were produced for collectors' sets. The coins officially measured in diameter and weighed 2.83495 grams. The bronze coin is (was) made up of 95.5% copper, 3% tin and 1.5% zinc. It was introduced in 1928 to replace the British farthing