Most likely you have a model 31-1 that has been Industrial Hard Chromed. It is almost indistinguishable from stainless in appearance at times and wears very well. But if the model stamping is correct ( and it should be since the much newer stainless version was for the .32 H&R Magnum and the model number preceded with a "6") and the barrel says .32 S&W Long, it's not stainless.

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