Standard post-war 32 Hand Ejector that would have shipped from the factory in 1951 or 1952. By 1948, the ejector rod knob was eliminated and the 4 line frame stamping had started. Also, the transition from round top hard rubber stocks to magna style stocks were standard on most all post war I frames after 1950.

I cannot tell but there should be a screw on the front of the trigger guard? If not, this would be considered an Improved I frame, but I think that change took place after your gun was made.

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Gary
SWCA 2515