I will live vicariously through your purchase. That is a quite beautiful shotgun. Nothing about it looks out of sort. The colors and condition are very nice and appear all original to me.
The different number on the locks (I did not see a pic of the locks) is likely a patent use number, although with the 1925-6 production, I would have thought that patent would have expired. You will likely see a number on the water table that matches the locks.
The case looks very nice and totally repairable.
I see there is a sling in the case. I don't see a sling stud on the butt. Curious about that.
