If the information is not published (common with special runs, but not with more modern standard production S & Ws), my impression is that means the information could be found but the factory is not motivated or willing to share it. You could also imagine they would not want to reveal the size of the market for a particular gun and configuration to the competition.

Not their fault, just not a priority.

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Alan
SWCA LM 2023, SWHF 220