AE25 of Macedonia. Time of Caracalla or later.

Obv: ALEXANDROU, head of Alexander III right, wearing lionskin.
Rev: KOINON MAKEDONWN NEW B, Alexander standing right, naked 
except for chlamys which flies behind him, taming Bucephalus
 who rears left before him.

BMC 108.

Ancient Coin Art, 2002. Added from "Mystery Coin" folder, May 2010.