Welcome! A few questions.

Does it chamber a .44 Magnum?

Is there an over- or second model stamp on the frame under the barrel, where the serial number is also stamped?

It is most likely a model 57 mis-stamped as a model 29-2. A letter of authenticity from the S & W Historical Foundation may be helpful, but if the records show it as a model 29-2 there would probably be nothing to indicate it was a .41 Magnum.

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Alan
SWCA LM 2023, SWHF 220