What gbear is trying to determine is if you have a welded receiver.On the right front leg is a drawing number,if that number isn't correct for the serial number of the rifle it usually means the receiver has been welded together from two halves of receivers that were demilled and welded back together,not necessarily from the same rifle.g-dave and gbear 48: First, what is a timing block? How is it used? Sorry.
Source/history: Sprinfield Armory, 1944. I did not see any other mfgs names on gun parts. Is this what you meant? Thanks to you both. Dan