I've never seen the '42 in any grade even when it used to be a $5 coin in Unc. It's been on my buy list forever. Until very recently there was just no way to tell scarce coins from common ones. I'd guess the mintage of this in the one million range but it's tough to get a good estimate when you've not seen even one. People might find this eye opening;http://www.rustypennies.com/catalog/soviet_coins.html