Galba, AE As, Tarraco mint. AD 68-69. 9 g.

SER GALBA IMP CAESAR AVG P M TR P, laureate head left, globe at point of neck.
QVADRAGENS REMISSAE, SC, arch surmounted by two equestrian statues, three bound captives walking right (one inside the archway) on the left, with an officer behind them.

RIC 80; BMCRE 205 (this coin)

Image courtesy of the British Museum.