These are all Smith and Wesson 629 Mountain Guns in .44 mag. Some appear to have case hardened triggers and hammers while some do not. There maybe a few decade separation in their manufacture which may explain it. 2 are NIB so it shouldn't be from cleaning. I do not believe the parts are case hardened but how can it be from use if they are NIB?
Not sure how 20-30 years of sitting in a case or being handled without being fired would cause this discoloration.
The gun on the top right appears to have no discoloration while the bottom right appears to be starting to get discoloration and the two left side guns appear to have full discoloration and look like they are case hardened.
Not sure how 20-30 years of sitting in a case or being handled without being fired would cause this discoloration.
The gun on the top right appears to have no discoloration while the bottom right appears to be starting to get discoloration and the two left side guns appear to have full discoloration and look like they are case hardened.