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 northern India between (1540–1545). It was used for the silver coin weighing 178 grains. He also introduced copper coins called "Dam" and gold coins called "Mohur" that weighed 169 grains. Later on, the Mughal Emperors standardised this coinage of tri-metalism across the sub-continent in order to consolidate the monetary system. With the Spanish colonization of the Americas after 1492, there were significant finds in both New Spain (Mexico) in various sites in mainly in the zone outside indigenous settlement and in Peru, with the discovery of the great silver mine of Potosí (in modern Bolivia). The Spanish crown licensed mining