Sort of think Nightlords original figure is pretty close, maybe bump it up a bit for the fact it IS an AC40 standard.
Photo of the right side of the barrel lug (lock the slide open) might narrow down the barrel year.
It is definitely not a 1940 barrel, but the serial fonts on it point to it being off of an AC41 or 42 IMO.
I would have agreed with the 1000 figure if the barrel had been the only item swapped out.
The original stocks on that pistol would have been dark chocolate mottled Walther produced stocks that
were serialed (on the inside) to the gun.
Those look to be (quality of photo makes it hard to say for sure) mid war AEG reddish bakelites that are on it now.
They did not appear on Walthers until late in 1943.
Again, photos of the interior of the stocks would confirm.
FWIW - For selling purposes (if photos are needed) you might clean the stocks in warm soapy water with a sponge
and rinse with more very warm water. No oil on them. You'll see the bakelite contrasting colors kind of jump out.
The pistol's right side slide proofs look straight with the firing proof (center eagle) and the final acceptance stamp (the right side '359')
still in the white because both were applied after the pistol was totally assembled and finished.
The '359' to the left was the completed slide acceptance mark and was applied while the slide was in the white.
Makes me believe that it is a bringback/pre-68 import.
Chances are good it was bought/brought back that way (field repair/replacement), but a lot of years have gone by
and it is a classic example why you can only buy the gun as-is.
It would be considered a very nice placeholder for many collectors.
Thanks for sharing, JT