A Republic of Ireland KM-19 half-penny, minted between 1971 and 1986, is worth about $1.25, if it is a proof coin. In brilliant, uncirculated condition, it is worth about 60 cents. In uncirculated condition, the coin is worth about 30 cents.
Over 150 million of this type of coin were minted between 1971 and 1984 by the Republic of Ireland. The bronze coin is 17.1 millimeters in diameter and weighs 1.78 grams. The front of the coin has an image of a harp. The back of the coin is decorated with a stylized bird with its neck looped around its body.