I have a Victorinox/Hoffritz Champion SAK. The scale carries the logo of both brands. It was purchased at a Hoffritz store in Manhattan in the early-mid '70's. It's one of my most carried knives even though I don't EDC it much...but it's been in my pocket or belt cased for everything I've done outdoors since I bought it, which constitutes a lot of time. Luckily I still have it. It's had several sets of tweezers and picks, the small screwdriver blade is bent a little and the scales have some scuffs. Overall it's still in very good shape. Never had a touch of rust and no main blade play. Obviously I cherish it as much as any knife I own, having saved my butt in the wild numerous times (or at least made many tasks a hell of a lot easier).
The only reason I still have it is I never abused it (much). Always kept in mind that it has limitations and is a SMALL tool. Usually I had other equipment that would handle what was at hand anyway. I think the main cause of death among SAKs, even moreso than regular knives, is abuse---thinking that little pair of scissors will cut that barbed wire.....