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
Twopence (British pre-decimal coin) below and to the right. Above, on the rim, is incused the word , and on the rim below the image is incused the date . The reverse was also designed by Kuchler. The word appears next to the shield, indicating that the coin came from the Soho Mint. Twopence (British pre-decimal coin) The pre-decimal twopence (2d) was a coin worth one one-hundred-and-twentieth of a pound sterling, or two pence. It was a short-lived denomination, only being minted in 1797 by Matthew Boulton's Soho Mint. Before Decimal Day in 1971, two hundred and forty pence equaled one pound sterling. Twelve