I don't know a lot about hammered coins, but the "S" looks like it was made by someone who couldnt engrave curves in the die. So used dots instead.Also, the inscription just doesn't match anything in books or the web.
The reverse if flat although there "may" be a couple of letters there.
I'm not too worried about it being a forgery, I would like it to be of the correct date, whatever that is, though.