I don't collect coins. But I have one piece I wanted to find information about. It is 1796 4 kopecks. I got it in primary school from my friend who had told me he'd found it in millitary training ground in Mazovia region, Poland. A few days ago I took it to a numismatic shop but there I was told that my coin must be a fake because they are so rare. Maybe it is indeed, but I want to know how to check it.
Kind regards!