Watch List notes:

Huvishka imitation. Late 2nd century A.D. Æ 1/4 unit (22 mm, 2.88 g). Balkh region. King seated on ornate couch with Baktrian legend around / Moon god Mao standing left with hand raised in benediction. Pieper 1247. An attractive specimen with dark patina. Choice. Dark brown-green patina. Good very fine. 

This is from a series of small light-weight Huvishka imitative types. According to Mitchiner, this is a Jouan-Jouan issue found in the Balkh region.