Caligula, AE of Philadelphia, Lydia. 37-41 AD, 3.53 g. 

GAIOS KAISAR, bare head right, lituus before. 
FILADELFEWN ANTIOCOS, winged thunderbolt. 

RPC Suppl. I, S -3029 A.1 (this coin). 
ex Aufhäuser 9, 279.


Courtesy of Helios Auction 5, June 2010, lot 821.