Very nice early 39-2 package,
I'm wondering if your magazine followers are the newer plastic type or older metal "figure 8" style?
The new extractor was the big new obvious 39-2 improvement but there were several features that carried over from the Model 39 to the early 39-2 like yours that changed in the next few years, some for obvious reasons and some not so much.
To list a few the hole in the hammer dissapears, the slide stop notch goes from the two dimples to a straight cut, the big butt ampersand, the barrel bushing, the magazine release button and the spacing of the safety lever which gets widened to fit the new wider frame model 59 so they could eliminate the relief cuts made in the early 59 frame to clear the safety lever.