Horseman on Ancient coin. [solved]

I found this coin while rummaging in cheap boxes at the Charing Cross Market and was intrigued. It looks classical but I don't recognize the language and couldn't find anything similar on Google. Copper, 20mm and weight is 9.18g. Would appreciate any help.



Thanks
James

Hello Bitteswell,

I think it is a Kushan tetradrachm. See the second entry here :
http://coinindia.com/galleries-vima-takha.html
Maybe not an exact match but very similar.

Henri, you are a treasure. Now a whole new world opens up of research into the Kushans! Thank you so much.