Watch List notes:

Gaius, called Caligula (37-41), As, Rome, AD 37-38; AE (g 12,07; mm 29; h 7); 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.
Expressive portrait, green patina, about extremely fine / extremely fine.