Watch List notes:

Gaius (Caligula), with Divus Augustus. AD 37-41. AR Denarius (18.5mm, 3.63 g, 6h). 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, slightly granular surfaces. Rare.