Vlim, thanks for your posting.
Looks like the Swiss tooling used a round tool for the cut like the DWM tooling. Is the area above the rounded cut flat or curved up to the back wall of the frame?
The post war Mauser (1960s-1970s?) has the more regular and uniform look of CNC equipment, possible a mill that can change tools automatically.
Interesting that the rear of the receiver is flat, lacking the two vertical inner "ears", in both the late Mauser and early Swiss.
Was the post war tooling based upon the Swiss design?
Marc
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