Seleukos II Kallinikos. Seleukid Kingdom. AE18. 246-225 BC. 3.31 g. Magnesia ad Maeandrum mint. 

Diademed head of Artemis right, quiver behind shoulder.
BASILEWS SELEYKOY, Apollo standing left, holding arrow and resting hand on bow at his side. WPA monogram in left field, ME monogram in right field, all within maeander border. 

Voigt, Hermitage 180. SC 670 var. (one monogram); Hoover HGC type 347; Newell WSM -; BMC -; Houghton Coll. -.
Rare with these two monograms. 

With permission of cngcoins.com, auction 257, Lot 146, June 2011.