Tium, Bithynia, AE23, semi-autonomous issue, 3rd Century AD. 5.72 g. 

TEIOC, diademed and draped bust of Teos right, countermark Delta (4 Assaria).
TIANWN, Dionysos, naked, standing left, holding kantharos and thyrsos. 

RecGen 13; Berliner Blätter II, 1; Bernhard 42.

With permission of cngcoins.com, Electronic Auction 77, Lot 69, Nov. 2003.