Watch List notes:

Kanishka I. A.D. 127/8-ca. 147. Æ 1/2 unit (21 mm, 9.12 g). Crowned king standing left, holding spear and sacrificing at altar at left, with traces of Baktrian legend around / Four-armed Oesho (Shiva) standing facing, head turned to left, nimbate, holding drum and diadem in right hand, trident and water pot in left; Baktrian legend OKPO at right. MK 782; MACW 3132. Very Rare. Minor roughness. Green patina. Fine / very fine. 

Kanishka's half units are much rarer than the full units, and quite hard to come by in any condition.