So I got the pistol back from the gunsmith today. It got a stamp of strong health, perfectly safe to shoot. He confirmed all original parts on it, and no signs of refinishing. The right side grip chip is still there a well, luckily.
The holster, on the other hand, is pretty interesting. When I asked about the pistol, the owner said that her husbands father was the original owner. Then the next day, she said something about him bringing it back from WW2. That makes more sense now. Any idea what this is worth? Or more info on it's origins? I know what the top marking is, but curious about the "cgn 4".
The code under the Waffenamt reads WaA920.