39-40 AD., Gaius for Germanicus, Rome mint, As, RIC 43.

Gaius (called Caligula), in the name of Germanicus (his father), Rome mint, 39-40 AD.,
Æ As (26-28 mm / 10.81 g),
Obv.: GERMANICVS CAESAR T[I] AVG F DIVI AVG N , bare head of Germanicus l.
Rev.: C CAESAR DIVI AVG PRON AVG P M TR P III P P , around bigger S C.
RIC Gaius 43 (R2) ; BMC Gaius 60 ; Coh. - ; CBN 106 .