Denarius Debasement of the coin's silver content continued after Nero. Later Roman emperors reduced its content to 3 grams around the late 3rd century. The value at its introduction was 10 asses, giving the denarius its name, which translates as "containing ten". In about 141 BC, it was re-tariffed at 16 asses, to reflect the decrease in weight of the as. The denarius continued to be the main coin of the Roman Empire until it was replaced by the antoninianus in the middle of the 3rd century. The coin was last issued, in bronze, under Aurelian between AD 270 and 275,
Florin (Irish coin) also the silver coins wear less well. The cupronickel variety of coin consisted of 75% copper and 25% nickel. The coin measured in diameter and weighed 11.3 grams. The last florins were produced in 1968. When the currency was decimalised this coin continued to circulate alongside its replacement ten pence, and the florin was finally withdrawn from 1 June 1994 as a smaller ten pence coin was introduced. The reverse design featuring a salmon was by English artist Percy Metcalfe. The obverse featured the Irish harp. From 1928 to 1937 the date was split either side of the harp with