Watch List notes:

Gaius, called Caligula (37-41), As, Rome, AD 37-38
AE (g 10,72; mm 27; h 6)
C CAESAR AVG GERMANICVS PON M TR POT, bare head l., Rv. VESTA, Vesta seated l., holding sceptre and patera; in field, S - C. RIC 38; C 27.
A very nice portrait; glossy brown patina, good extremely fine.