Validity and Authenticity of 6 ruble Russian Empire platinum coin overdate
I made a post about this coin a few times before but I wanted to get another opinion on authenticity and where to go from there and whether it would be possible to get my coin published in a journal or paper.
I acquired this coin from Heritage Auctions and it has been graded by NGC as AU-55. However, I talked to a dealer specifically specializing in Russian coins and he said he is completely unaware of Russian imperial platinum coinage having overdates. Which is why I came here to see what the consensus is. I understand I bought it from a reputable auction house and NGC (reputable grading company) has already certified it but I want to be sure that what I have is a genuine specimen and not a fake. Any tips and advice is appreciated!
u/gothikplatypus — 1 day ago