Uncia (coin)

The uncia (Latin, "twelfth part") was a Roman currency worth one twelfth of an as.

Issued in Rome between 275270BCE.

Republican coin

By derivation, it was also the name of a bronze coin valued at 112 of an as made during the Roman Republic.[1] The uncia started as a Roman-Oscan weight of about 23 grams for a 273 gram pound, 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 (c. 289245 BC), a barleycorn (c. 280245 BC), and the helmeted bust of Roma (from c.240 BC).

Empire coin

In imperial times the uncia was briefly revived under Trajan (98117) and Hadrian (117138). This coin was about 1114 mm in diameter and weighed about 0.81.2 grams. 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

Notes

  1. William Boyne, A Manual of Roman Coins: from the earliest period to the extinction of the empire, W. H. Johnston, 1865, p. 7. Available online.
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