Watch List notes:

Gaius (Caligula). AD 37-41. AR Denarius (18mm, 3.69 g, 1h). Lugdunum (Lyon) mint. Struck AD 40. C • CAESAR • AVG • PON • M • TR • POT • III • COS • III, laureate head right / [S] • P • Q • R •/ P • P/ OB • C • S • in three lines within oak wreath. RIC I 28 (Rome); Lyon 183 (unlisted dies); RSC 21; cf. BMCRE 29-30 (aureus); BN 39. Toned, some scrapes and scratches on reverse. VF.

From the S & S Collection. Ex Johns Hopkins University Collection [inv. 31.7.687] (Part I, Numismatic Fine Arts & Bank Leu, 16 May 1984), lot 729.