Hi there!
please help me recognizing this coin.
It is made of copper and its weight is 4.500 grams and it have diameter 1.75 cm. Below is the picture of what i have in hand.
Kanishka I (ca.127/8-152 AD), Kushan Empire. King standing left beside altar, holding trident. Bactrian legend. Control mark in left field / Goddess Mao, MAO in the right field, tamgha and monogram in the left field. 18mm, 4.5 grams. Mitchiner ACW 3161.
Maybe it will give you a starting point for research. It would help if we knew where you found it.