Hello Marc,
That is a fine looking RZM & I would rate it 90% or better if I could see the grip strap. The holster in my opiinion is not from that time period, however I could be wrong. The reason I say this is that snaps were not used by the Germans until later on. Is there any markings or letters on the back of the holster & can you get a close up of the circle on the bottom half of it? I also wanted to point out that after I checked my little sn# book, your pistol may have been made in early 1935, notice I said maybe. Please get back to me on the holster pics, as you may have something very rare.
Kind Regards
Danny
Re