Caligula (37-41) AE As (Bronze, 10.49g, 26mm) Roma (Rome), 37-38
Obv. C CAESAR AVG GERMANICVS PON M TR POT, bare head of Caligula left.
Rev. VESTA / S - C, Vesta, veiled and draped, seated left on ornamental throne, holding patera and long transverse sceptre.
Ref: RIC I 38.