Ss marked 1910 mauser

[Mibit911]

Hey guys I got an odd duck today. Picked up a mauser 1910 from a friend and collector with possible ss markings. He says it is from the year 1934 as it was last year of production, but I assume he just meant last year of production for the third transitional models which is what I believe it isThe collector I got it from is a good friend who runs the local lgs and had sold it 9 years ago to a collector and recently just bought it back. Wanted to see what you guys thought.
The hand stamp on the side was actually done hard enough that the frame is partly dented in, but also isn't a proof mark as at the time the u over crown proof mark which is seen on the barrel and slide would have been normal. So I'm thinking an early party member had it stamped this way. Not to much info otherwise.