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,
New Zealand ten-cent coin coin replacement. The new 10-cent coin had the same reverse as the 1967 to 2006 minted coins and the same obverse as the 1999-onward coins, but the coins were reduced in size. The new 10-cent coins are made of steel, plated with copper. The new coins are 20.5 mm in diameter and 3.30 grams in weight. They have unmilled edges. The old 10-cent coins were demonetised on 1 November 2006. New Zealand ten-cent coin The New Zealand ten-cent coin is the lowest-denomination coin of the New Zealand dollar. The 10-cent coin was introduced when the New Zealand dollar was introduced