Halfpenny (Irish decimal coin) particularly rare, and valuable to coin collectors - the vast majority of the 2.8 million were melted in 1987. The 1986 coin was only produced for the 1986 specimen sets and is also rare. Halfpenny (Irish decimal coin) The decimal halfpenny (p) () coin was the smallest denomination of the Irish pound. It was first issued when the Irish currency was decimalised on Decimal Day, 15 February 1971. It was one of three new designs introduced all in bronze and featuring ornamental birds on the reverse. The coin value was weakened by inflation and very few were produced beyond the
Coins of the pound sterling one-pound coin, depicts the entire shield of arms on the reverse. All current coins carry a Latin inscription whose full form is , meaning "Elizabeth II, by the grace of God, Queen and Defender of the Faith". In addition to the circulating coinage, the UK also mints commemorative decimal coins (crowns) in the denomination of five pounds. Prior to decimalisation, the denomination of special commemorative coins was five shillings, that is, of a pound. Crowns, therefore, had a face value of 25p from decimalisation until 1981, when the last 25p crown was struck. Ceremonial Maundy money and bullion coinage of