[ExSoldier]

I don't think the PPK was being made at that time. IIRC that was a model PP. Looks a bit different, too.

[yarddog]

I don't think the PPK was being made at that time

Naw, the PPK has been made nearly as long as the PP. I am not sure of the exact dates but it was made well before WWII. I will say that every .22 I have seen has been a PP model.

Is is possible you are thinking of the PPK/s which dates from just after the Gun Control Act of 1968. They put a PPK slide on a PP frame to make the PPK/s which was just large enought to score enough points to be imported.