Helmeted, draped and cuirassed bust right / BAΣIΛEΩΣ ΔIKAIOY HΛIOKΛEOYΣ ("Of King Heliocles the Just"), Zeus seated left, holding Nike and spear; M at knee. 21mm, 3.48 grams. Balkh mint (?). SNG ANS 658; MIG 287a. SKU X3445-53455

Very rare and expensive (see a similar quality coin for from Freeman & Sear, Mail Bid Sale 12, lot 240, which sold for 1210$ + 15% buyer's fees,

Heliocles I (reigned 145–120 BCE) was a Greco-Bactrian king, brother and successor of Eucratides the Great, and considered (along with his co-ruler and son/nephew Heliocles II) the last Greek king to reign over the Bactrian country. His reign was a troubled one, full of  instability and war, which caused the Indian parts of the empire to be lost to Indo-Greek king Menander I and southern Bactria to be lost to the Yuezhi.