16 BC., Augustus, Rome mint, moneyer Caius Gallius Lupercus, triumvir monetalis, Dupondius, RIC 378.

Augustus, Rome mint, moneyer Caius Gallius Lupercus, triumvir monetalis, struck 16 BC.,
Dupondius (ø 25,5-27 mm / 7,71 g), brass (“orichalcum“), axes irregular alignment ↑↖ (ca. 300°),
Obv.: AVGVSTVS / TRIBVNIC / POTEST , legend in three lines within oak wreath.
Rev.: C GALLIVS LVPERCVS III VIR AAA FF / S C , legend around large S C.
RIC I, p. 70, no. 378 (scarce) ; BMC 173 ; CBN 422 ; Coh. 435 .

Maybe a contemporary ancient imitation? RIC lists the weight peaks for dupondii of this issue 13,5 – 11,5 g.