No offense to moderator, but there is no published data for Model 70 Classics after, I think 1991. This is why you can't find any information on when your rifle was built. I have to laugh at some of the build dates reported by people who called Winchester to get the DOM on their rifle! It seems even Winchester doesn't realize a serial number without the "G" prefix and with the "G" prefix are DIFFERENT! Your rifle with a "G939XX" serial number must be a Classic, and my best guess, based on rifles in my collection, would be 1995 to 1996. Winchester serial numbers get very confusing after the introduction of the Classics! Hope this helps!