Gaius Caligula. 37-41 AD. Æ As (11.04 gm). Struck 37/8 AD. 

C CAESAR AVG GERMANICVS PON M TR POT, bare head left
VESTA above, S C across field, Vesta seated left on ornate chair,
holding patera and sceptre. 
RIC I 38; BMCRE 46; BN 54; Cohen 27. 

Contributed by goldenancients of the Forum Ancient Coins, Nov, 2011