Very very Nice Collection you have there!
Congratulations on the acquisition of your AC44 Walther P38!
I also have a WWII AC 44 Walther P38 and an S/42 1936 Mauser made Luger, both of which were re-blued before I got them. Both are still very shootable.
I did however, put new Springs in the P38 to keep it operational. I also have two Post-War pre-P1 P38's and a German Made Walther PPK/S .380.
AC44 Walther P38 and S/42 1936 Luger
Walther PPK/S .380 and Browning BDA .380