Ok, I've got a Mosin that I've had for a couple of years now that I'm having issues with being sure of what model it is. It was made in 1910 at the Izhevsk arsenal. I know that in 1910 the Russians modified the original M-91 and then gave it the designation of M1891/10. Now, the question is, and I've asked before with absolutely no luck, when did the make the change? Right at the start of the 1910 production year, or in the middle of it, or maybe even 1911? I have found some things that point towards it being the 1910 model because from what I've found, it seems as if the original M91 model didn't have an upper hand guard, and the 1910 did. Mine has the hand guard. I'll attach some photos of the old girl for pickin' over. :feedback: Thanks!