The Biunx denomination
The biunx - two uncia - was a rarely used denomination during the Roman Republic.

It was used for both Aes Grave coinage and for struck coins.

It corresponded roughly to the sextans, which was also valued as 2 uncia, but the sextans was used when asses were valued at 12 uncia, and the biunx when assses were valued at 10 uncia.
(1) Luceria
An AE Biunx struck 211-200 BC in Luceria
Obverse: Veiled and wreathed head of Ceres right, ●●

Reverse: Scallop shell, LO / VCERI

Diameter: 17 mm
Die Orientation: -
Weight: 5.8 g
No notes for this coin
HN Italy 681, SNG ANS 708, SNG BnF 1364