Penny (Irish decimal coin) from 2002 on its own). 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
Commemorative coins of the United Kingdom the decimal era, crowns were converted to twenty-five pence. 50p and recent £2 Coins circulate normally and can be found in change. Usually about 5 million of each of these are the commemorative issue, the rest being of the standard design. Since 1982 all of these have also been produced as Sterling silver and 22 carat Gold proofs. Although the design of the £1 Coin changes every year, these are not considered to be commemoratives, as they do not mark an event or its anniversary. Twenty-five pence Non-circulated Circulated Commemorative coins of the United Kingdom Commemorative coins have been issued