I just acquired a 32 S&W Safety Hammerless with a low serial number that is missing the side plate screw. Seems that they are hard to find, however my question to the antique collectors is: are there any other S&W models that would be using the same threaded screw? I find these little guns fascinating as last week I bought the 38 SH that is now soaking in ATF/Acetone with a stuck firing pin. Would appreciate your suggestions.