Caligula, AE16 of Lampsakos, Mysia, 4.01 g.

G KAIS-AR CEB, bare head right.
LAMPsiA, head of Priapos right.

Ref: RPC 2280; SNG Cop 231; Hunter 12

With permission of Numismatik Naumann, Auction 41, Lot 456, Feb-March 2016.