Uncia (coin)

By derivation, it was also the name of a bronze coin valued at 1⁄12 of an as made during the Roman Republic.

In imperial times the uncia was briefly revived under Trajan (98–117) and Hadrian (117–138).

This coin was about 11–14 mm (0.43–0.55 in) in diameter and weighed about 0.8–1.2 grams (0.028–0.042 oz).

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.