Help to identification a coin form middle east [opgelost]

Hello, could you help me to identify this coin ? The weight is 5,36 grams and the diameter is about 2,5 cm . 

The composition seems silver and the coin isn't magnetic. 

I've acquired a lot of coin that should be from Iran, but didn't know this type of coin so need help to identify them. 

If is possible, I would appreciate a coin valuation.  

thanks in advance and best regards Fabio Cittadini

N#195072 ? 

Or something similar. 

Thanks for your support.

greetings Fabio Cittadini