Those are Post War East German Vopo Markings in your pics (second picture) and it is a Vopo rework. Same markings you see on a Vopo Luger, Vopo K98...it looks like a nice rifle for a Vopo.
The Vopo strikes again
They do make for nice shooter grade K98's though -- probably the best option that doesn't wear out a true original example and still much better than 'Mitchell's Mausers'

-Steves