Penny (Irish decimal coin) Penny (Irish decimal coin) The decimal one penny (1p) () coin was the second smallest denomination of the Irish pound. It was first issued when the Irish currency was decimalised on Decimal Day, 15 February 1971. It was the second of three new designs introduced all in bronze, the others being a half-penny and a two pence coin. All featured ornamental birds designed by Irish artist Gabriel Hayes on the reverse. The coin originally had a diameter of 2.032 centimetres and mass of 3.564 grams consisting of copper, tin and zinc. This was identical to the British decimal penny as
Coins of the Australian pound making it the most expensive copper coin in the world. Florin = 2 shillings Coins of the Australian pound Federation in 1901 gave the Commonwealth a constitutional power to issue coins and removed this power from the States. However, British coins continued in use until 1910, when Australian silver coins were introduced. These included florins, shillings, sixpences and threepences. They had a portrait of King Edward VII on one side. Australian pennies and half-pennies were introduced into circulation the following year. In 1931 gold sovereigns stopped being minted in Australia. A crown or five-shilling coin was minted in 1937 and