My understanding was that the regular 442 was carbon steel, which can rust, whereas the stainless steel of the 442 PC, will not.
It's certainly splitting hairs, but I believe they are different materials from standard to PC as opposed to just some coloring.
Mine is stainless, however, I just checked their website, and it appears they went back to carbon steel on the regular model. They've switched back and forth apparently. Now they offer the 442 with moon clips, in stainless.
Product: Model 442 Moon Clip
I see they also offer it w/o the lock, but back to carbon steel again.
Product: Model 442 Revolver - No Internal Lock
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