Watch List notes:

Gaius Caligula. A.D. 37-41. Æ as (28.7 mm, 10.87 g, 7 h). Rome mint, A.D. 37-38. C CAESAR AVG GERMANICVS PON M TR POT, bare head left / VESTA, S-C, Vesta seated left, holding patera and sceptre. RIC 38; BMCRE 46. Fine, green patina.