Watch List notes:

Gaius (Caligula). AD 37-41. AR Denarius (18mm, 3.51 g, 1h). Rome mint. Struck AD 40. Laureate head right / S • P • Q • R •/ P P/ OB • C • S in three lines; all within oak wreath. RIC I 28; RSC 21. Toned, porous. VF.

From the Conti Collection. Ex Edward J. Waddell inventory 29735 (ND).