Watch List notes:

Gaius (Caligula), with Germanicus. AD 37-41. AR Denarius (19mm, 3.68 g, 6h). Rome mint. Struck AD 37-38. Laureate head of Gaius (Caligula) right / Bare head of Germanicus right. RIC I 18; RSC 2. Near EF, toned. Nice metal.