Need to know aproximate value on a pre model 42 centennial airweight .38 spl with the bugscrew above the top sideplate screw ( early production later they deleted this screw ) screw gun is about 92 , 93 % and has 4 digit serial number and has faux pearl grips with the S&W logo medallions gun is tight exc. mechanically nice piece overall thanks 41steve [email protected]