I mostly collect ancients and I don't know Russian coins well. I have come across this 1741 rouble of Ivan VI, which i suspect is a reproduction. In its favour: weight is correct at 25.85g & diameter is 41mm. Style looks right too. However, I still suspect this is a fake. I'm not sure the metal looks right. And I realise real ones hammer for prices in the thousands. What do you think? Real or fake?