[Edward Tinker]

Brad I see what you are saying, but seeing "proof" from the book proves that the gun has been changed, not that the owners or owners at the time did the boosting, yet that is the gist of what you are saying? And you and Jan would like us to connect the dots? So connecting the dots seems premature without knowing who has the gun / guns at this time, or even guessing who did the possible boosting / changing of the gun.

I can't imagine being able to prove this without experts looking at the gun? In real life, wouldn't a receiver be changed by griding down and then restamping the new date? I would think it would be very difficult to do this without looking changed? One of those in real life would look odd and might look good in pictures?