I have seen coin before, possible 5-7 years ago on eBay some body sold this coin. From the image coin looks authentic , on 11 o'clock possible mounting removed ,but you have purchasing
for Great special price for today market and for one plus highest grade on the auction coin will cost $$$$$.
Coin remind me the time then I stop collecting poltinas .
Would love to see a coin after you receive it. Great buy Igor, congratulations!