Uncia (coin)

By derivation, it was also the name of a bronze coin valued at of an as made during the Roman Republic. The uncia started as a Roman-Oscan weight of 22.75 grams for a 273-gram pound (libra), with Attic weight issues of about 27 grams under the libral standard for a 327 gram pound and was produced occasionally towards the beginning of Roman cast bronze coinage. Obverse types of the uncia include a knucklebone ( BC), a barleycorn ( BC), and the helmeted bust of Roma (from ). ==Empire coin==

In imperial times the uncia was briefly revived under Trajan (98–117) and Hadrian (117–138). This coin was about in diameter and weighed about . It featured the bust of the emperor on the obverse with no inscription and "SC" (for Senatu Consulto) in a wreath on the reverse. If this issue belonged to the imperial system, meaning it was not a provincial piece, it would be an uncia. This issue may have been made only for circulation in the East. ==See also==