[DonVoigt]

Yes,
the pictures are all there.
So far you have a DWM frame and a 1939 Mauser receiver with DWM center link.
A picture of markings on the bottom of the barrel will help(and of any other markings on the barrel, also close ups of the left and right side of the chamber area. Then take it apart and take a picture of the inside of the frame from the top, and a close up of the "well" that the take down lever goes through- there should be some markings there.

The markings on the rear grip are strange for sure, no ideas there.

Someone else can comment on the holster, but it looks ok to me.
Next time you need a holster "fixed" don't let a shoe maker touch it, get it done right by lugerholsterrepair on this forum.
The closure strap should be hand stitched in a specific pattern.