Septimius Severus, AE22 of Kaphyai, Arkadia. 4.33 g. 

AYTO KAI LOY CEPT CEOYHROC PER, laureate head right.
KAFYIATWN, Poseidon standing left, holding dolphin and trident.

BCD 1386 (this coin); Gress 554.

With permission of LHS Numismatik AG auction 96, Lot 1386, May 2006.