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,
Two guineas (British coin) Two guineas (British coin) What is nowadays known as the Two Guineas coin was first minted in 1664, in England, when it had a nominal value of forty shillings and it was known as a forty-shilling piece, then it was later called a double-guinea or two guinea piece, worth forty-two shillings after the Proclamation of 1717 finally settled the value of a guinea. The term "guinea" indicates the source of the gold used to strike the coin, i.e. from west Africa. For most of its period of production the coin weighed 16.7 - 16.8 grams and was 31-32 millimetres in