Watch List notes:

Anonymous. Eearly-mid 1st century B.C. Æ tetradrachm (28 mm, 13.54 g). Imitating Heliokles I of Baktria. Diademed bust of Heliokles right / Zeus standing facing, holding thunderbolt and long scepter; monogram to inner lower left. Senior A21.1T; ANS Kushan 31; HGC 12, 174. Dark patina, a few shallow pits. Very fine. 

A similar specimen was recently sold by CNG for $340 (E417, 343).