Dan,
The comparison of the two rifles is very interesting.
I have had my rifle for many years and have tentatively identified the set triggers as having been made by Hammerli. Either four or five lever type. It was a major undertaking to install these triggers in a M1903, but was done very skillfully, and they work very well.
The Lyman 48 receiver sight on your rifle appears to have 1/4 minute adjustments. I do not know for sure when the 48 became available with adjustments this fine, but I believe it was later than the time period of our rifles construction. My rifle has the same sight as yours, and I have always believed it was upgraded at some point. As Herschel posted above the rifle(s) were owned by a serious competitor.
The butt plate for my rifle is same type as yours, however is made of brass and painted black. It mounts with two screws in the same holes as the M1922 butt plate, which I keep on mine as it makes it easier to shoot from the bench.
I may have missed it but is your butt plate aluminum, or nickel plated brass?
Thanks, and best regards,
Rick
