The upper model 17 has been shooting a lot since 1959. It has some holster wear around the muzzle, but otherwise bluing is quite OK.
The lower gun was my first revolver, bought new in 1980. I was 14 then, and you know how a teenager can shoot- it has several tens of thousands of rounds under its belt. Never has been in a holster, and the bluing is nearly perfect.
All of this in the rain forest climate of northern Venezuela. I'll guess they'll be passed along to the next generation all right. So much for delicate bluing.