Watch List notes:

Gaius (Caligula), with Divus Augustus. AD 37-41. AR Denarius (18mm, 3.56 g, 4h). Lugdunum (Lyon) mint. 2nd emission, AD 37. Bare head of Gaius (Caligula) right / Radiate head of Divus Augustus right. RIC I 10; Lyon 160; RSC 3. VF, toned, flan crack, porous surfaces.