Antoninus Pius, AE20 of Synaus, Phrygia. AD 138-161. 4.2 g. 

AY KAI AD ANTWNEINOC, bare head right.
CYNAEITWN, Zeus standing left, holding eagle and sceptre. 

Lindgren III 617 (this coin); BMC 15 var ("AY KAI ANTWNEINOC").

With permission of cngcoins.com, auction 162, Lot 189, April 2007.
Note - in the sale the obverse is described as having a "small 
globe" beneath the bust. It is simply the O of OC which is 
continued beneath the bust.