My guess is this was rebarreled from a 5" revolver. I don't show any 2" guns in that immediate serial range, and I have recorded some 5" guns very close and on either side of your number. I do show a batch of 2" square butt examples in the S957xxx to S960xxx range and in the S966xxx range.

I suspect your revolver got itself a non-factory barrel swap sometime after it made its visit to the Service Department in February, 1950.

If this was a factory conversion, the SD would have stamped the correct serial number on the barrel flat. It stretches credibility to think the technician stamped two incorrect digits, although I agree it is possible. It is interesting that the last three match, I will admit. Strange.

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Jack
SWCA #2475, SWHF #318