Wow, that is tough to see! I still can't make the horizontal line on the 'e'.
Thanks for the quick correction.
Changes to the frame and slide were phased in during the 'f' block with Walther in 1943. I am actually still looking for a clean transition pistol where the second variation slide is used with the light frame.
During the same time period, magazine bodies were also lenghtened slightly to improve feeding resulting in the 'v' being added to the side of the body to identify it.
I still believe yours would have the early length magazine with the single eagle/359.
Given your good fortune in finding such a clean pistol, can't wait to see the holster. Some of the variations and rarer manufacturers are worth a pretty penny by themselves and would add to the selling value.