As (Roman coin) as, the (2), (2), . After the as had been issued as a cast coin for about seventy years, and its weight had been reduced in several stages, a as was introduced (meaning that it weighed one-sixth of a pound). At about the same time a silver coin, the denarius, was also introduced. Earlier Roman silver coins had been struck on the Greek weight standards that facilitated their use in southern Italy and across the Adriatic, but all Roman coins were now on a Roman weight standard. The denarius, or 'tenner', was at first tariffed at ten asses, but in
Silver coin introduction: Privately minted "silver rounds" or "generic silver rounds" are called "rounds" instead of "coins" because the US Mint and other government mints reserves the use of the word "coin" for Government Issued currency with a face value expressed in the national currency. The privately minted "rounds" usually have a set weight of 1 troy ounce of silver (31.103 grams of 99.9% silver), with the dimensions of 2.54 mm thick and 39 mm across. These carry all sorts of designs, from assayer/mine backed bullion to engravable gifts, automobiles, firearms, armed forces commemorative, and holidays. Unlike silver bullion coins, silver rounds