Nice early P38.
Iirc the early ones have a unique feature, well it's actually a weakness in that they found that ones that were heavily used on the Russian front showed that the trigger pivot pin did not have enough metal around it, I had one from 1942 that had the same straight frame below the pivot pin, IIRC they changed that around 1943 and if you compare a later one you notice the frame dips down just below the trigger pivot pin.
Another weakness that surfaced was that heavily used decockers could be peened to the point that it could discharge when decocked on a live round.
Dont think this would be addressed until the short lived P4 series which went to a spring loaded decocker that sprung back up as well as a system that seperated the firing pin from contacting the hammer face unless the trigger was pulled back.
The P38 is interesting to collect and compare as they had several wartime manufacturers and changes in design through the post war P38, then P1 ending in the P4.
Btw why it doesn't look it the P5 has its roots in the P1/ P4 as well.
On a final note, the P38, P1, P4, P5 other interesting feature is they all have the extractor claw on the left side and eject casings to the left as well.