Since it's reportedly stamped Mod 34 it's built on the 1953 New I frame and is the 3 screw side plate variation.

Although it's serial # normally would indicate it shipped around the end of 1956, it couldn't have shipped until after 1957 to be stamped M34. And is one of those anomalies we call a late shipper for it's low serial #.

I agree with the value posted above.

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Jim
S&WCA #819