Many years ago, I lost my first Swiss Army Knife(circa 1981 Victorinox Climber). Even though carried often, I also substituted my Case, & so probably didn't miss it for a day or three.
Months went by, I looked high & low & notified my circle of friends, but it didn't turn up. Finally I bought another one, different model(Victorinox Explorer), & was back in the SAK business. Good thing too, because at our get-togethers, the old one had opened many cases of Bud Longnecks, a duty the new one finally took over.
About 3 months after buying the 2nd SAK, one of my friends came by. He had just gotten his VW Rabbit worked on by the VW dealership in Longview TX. When he picked up the car afterward, sitting on the dashboard was my lost Swiss Army Knife! The mechanic had found it somewhere under the hood(I had looked there but...).
Total time that pocketknife rode under the hood of the Rabbit- 7 or 8 months. I used it hard, both before & after, & it's in rough shape- but still functional and in my box of SAK's.
SAK Tip for the day: If you should bend the tip of one(or both!) of the knife blades on your SAK while using it to chip block ice, and you get the urge to try to straighten it- DON'T DO IT! Just leave it alone. A little bent is much better than broken. No foolin'. Don't ask why I'm so sure about this.