Welcome to the Forum. S&W did not make a half million 32 rimfire Model 1 1/s, so something is not quite right here. If you could post a picture or review your serial number, we can help you out. THe Model 1 1/2 rimfire was a tip-up revolver and the Model 1 1/2 32 centerfire was a top-break, if that helps.
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Gary
SWCA 2515
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