16-6 BC., Augustus, Rome mint, unclear moneyer, As, countermarked AVG(usti), cf. RIC 373-442.

Augustus, Rome mint, issued by an unclear moneyer, struck ca. 16-6 BC.,
As (ø 24 26mm / 6,89 g), copper, axes irregular alignment ↑→ (ca. 80°), corroded,
Obv.: … / {AV}G , his bare head facing right, countermark {AV}G before head within rectangular incuse (AV ligate).
Rev.: … / S·C , legend around large S·C.
cf. RIC I, 373-442 .
For countermark: cf. Werz 54.48