Hi there, I posted this on the 24hr campsite forum but thought Id share here as well. I picked this up a few days ago because the proof marks peaked my interest. Ill admit I didn't know much of what they meant but figured they had to mean something interesting. I have never seen a 99 like it before. Some people suggest it could have been a "lend lease" gun but Im unsure how that could be proved true or untrue. The serial number dates it to 1917 (1887xx). Unfortunately it has been drilled and tapped and the forend and butt plate replaced They share the same serial number different from the receiver and butt stock. It looks like someone added the sling swivel to the barrel, that appears to be European as well. I had a gunsmith give it a quick check and all appears to be in working order, I guess I'll go shoot it the first chance I get.