John, you are correct regarding the year of the byf markings. I would submit that perhaps the seller didn't know what he/she was talking about since they said "BYF S/42". Either one of these marks appear at the same point on the toggle. So the chances of both being there are slim. The S/42 would be correct for a 1939, but maybe the seller thought byf was just another name for Mauser.
I would certainly give it a look see. If it is a 1939 byf, then run as fast as you can!!!
|