Philip I, AE27 of Kallatis, Thrace.

AVT M IOVL FILIPPOC AVG, laureate, draped, cuirassed bust right.
KALLATIANWN, coiled serpent with head lowered right:
Delta in right field. 

Varbanov 405 (this coin); 

Courtesy of Antike Muenzen Auction, 2001. Added Sept. 2011.