Look at the receiver ring in your picture
There is a polished -out deep corrosion pit in the ring, nevertheless the markings surrounding it are nice and clean and the inside of the pit is blued. To me it looks like a complete fake, made up from parts and marked with a rare maker's mark. Value wise, it's like a Mitchell Mauser, pretty to look at but of minimal collector's value.
The dot one could be real, but it looks very well kept for a late war model.