Watch List notes:

Gaius, called Caligula (37-41), As, Rome, AD 37-38; AE (g 11,54; mm 29; h 6); C CAESAR AVG GERMANICVS PON M TR POT, bare head l., Rv. VESTA, Vesta, veiled and draped, seated l. on ornamental throne, r. holding patera, l. long transverse sceptre; in field S - C. RIC 38; C 27.
Brownish patina, about extremely fine.