16-6 BC., Augustus, Rome mint, unclear moneyer, As, countermarked TIB AVC, cf. RIC 373-442.

Augustus, Rome mint, issued by an unclear moneyer, struck ca. 16-6 BC.,
As (ø 27-28mm / 9,09 g), copper, axes medal alignment ↑↑ (ca. 0°),
Obv.: … , his bare head facing right.
Rev.: ...II VIR… / S·C , legend around large S·C, countermark TIB {AV}C within rectangular incuse (AV ligate)..
cf. RIC I, 373-442 .
For countermark: cf. Werz 196.2