Kings Of Pergamon. Attalos I. 241-197 BC. AR Tetradrachm 31.5 mm, 15.98 g. In the name of Philetairos. Pergamon mint. Struck circa 235-210 BC. 

Laureate head of Philetairos right.
FILETAIROY, Athena seated left, holding wreath, elbow resting on shield to right; spear behind, palm branch 
in outer left field, DI in inner left field, bow to right. 

BMC 41 (Attalos II); Westermark Group VI.B, dies V.CXXV/R.3. 

With permission of Emporium Hamburg - Alpha Auction 2, Lot 47, Jan 2019.