Severus Alexander AE29 of Trapezus, Pontus. Dated local year 162, AD 225-226. 10.74 g. 

AYT K CEOY ALEXANDROC, laureate, draped and cuirassed bust right.
TRAPEZOYNTIwN, ET PXB, Mithras, wearing Phrygian cap, on horseback riding right, tree behind, small altar to right.

RecGen 34; Wojan 80; RPC VI 6629 (this coin); SNG Cop 227. 

With permission of Leu Numismatik AG auction 3, lot 518, Feb. 2018.