Trebonianus Gallus AE23 of Alexandreia, Troas. AD 251-253. 

IMP VIB TREB GALLVS AV, laureate, draped and cuirassed bust right.
COL AV TROA, Apollo riding griffin right, holding lyre and 
raising hand.

Bellinger A403; SNG Cop 178; BMC 142; SNG von Aulock 1481.
Rare. 
Estimate: $300

With permission of cngcoins.com, May 2015.