Yes, exactly. The S&W Forum figured (like you have) 1946/47 transitional model. It has the old long action and 5 screws. My other Heavy Duty (1956) has the modern action with 4 screws.Very nice S&W HD. Going from memory here. It appears to be very early post war, 46 or 47. From the picture it shows a large extractor knob with barrel cutout, one line "Made in USA" roll stamp and wearing early post war high horn diamond magna stocks. I believe the term used to describe this early post war S&W revolver is "Lerk", large extractor rod knob. Around 1948 some still had the large extractor knob but showing a two line address roll stamp. The early magna stocks, both K-frame and N-frame, had the high sharp square cut tops. Off hand I forget the term commonly used, seem to recall "High Horn" stocks? As the early post war boom kicked in S&W began to round off the tops of the magna stocks.
Also, the pre-war would still have easy to distinguish stocks and be the long action and possibly not have the hammer cutoff. ?? Post war went to the short action but some very early revolvers were assembled with existing pre-war parts and were still the long action. ??
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