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
20 sen coin 1888. 20 sen coin The was a Japanese coin worth one fifth of a Japanese yen, as 100 "sen" equalled 1 yen. These coins were minted from 1870 to 1911 in 80% silver. Meiji The following are circulation figures for the "twenty sen coin", all of which were minted between the 3rd, and 44th year of Meiji's reign. The dates all begin with the Japanese symbol 明治 (Meiji), followed by the year of his reign the coin was minted. Each coin is read clockwise from right to left, so in the example used below "一十二" would read as "year 21"