Watch List notes:

Gaius Caligula. A.D. 37-41. Æ as (29 mm, 12.18 g, 6 h). Rome. C CAESAR AVG GERMANICVS PON M TR POT, bare head of Caligula left / VESTA, S C across fields, Vesta seated left, holding patera in right hand, scepter in left. RIC 38; BMC 46; BN 54. Dark green and brown patina, light porosity on the reverse. Very fine.