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
Coins of British India mohurs were proof issues. Varieties with both the younger and mature busts exist. Currency and proof issues of the 1862 dated rupee coins have a number of different obverse and reverse die varieties, which are helpful in identification of the mint. The design of the coin, however, remained largely unchanged. From 1863 till 1875, the Bombay mint introduced an unusual system of dots to date the coins. These dots occur on the reverse below the date, above the word 'ONE', or in both positions. From 1874, this practice was halted and coins began to be dated continuously. From this development,