No such sn used by Walther.
Walther uses a date code of two letters.
You will need to contact Walther
You will need to contact Walther.
You will have to contact Walther to find out.
You will can contact Walther, but probably 1943-45.
@1944
1938
No sn data for one that new. You need to call Walther.
70-85
@ late 70's
Roughly 1940-1945