Kingdom of Pergamon. Attalos I, 241-197 BC. AR Tetradrachm, 28.5 mm, 17.07 g, struck ca. 241-197 BC. 

Laureate head of Philetaerus right.
FILETAIROY, Athena seated left on prow, holding wreath on extended right hand, transverse spear in left arm, upright 
palm branch in outer left field, EYMO monogram in inner left field, bow in right field. 

Westermark 89-95 (Attalos); BMC 39 (Eumenes); Warren 1031; Pozzi 2255.

With permission of cgb.fr - e-Monnaies March 2018, Lot 55.