Caligula, AE29 of Apamea, Bithynia. 

C CAESAR AVG GERMANICVS PON M TR POT, laureate head left.
GERMANICVS CAESAR DEC DEC C I C, head of Germanicus left,
monogram to left and right.

RPC 2013; RecGen 39; BMC 21
 
With permission of H. D. Rauch GmbH, April 2011.