I have four knives; A Mora carbon steel, the one with the illuminous sheath (so hopefully I won't lose it too easily
), two Opinel - one carbon steel and one stainless, and my trusty old Victorinox. The Victorinox was bought in 1978 I think, in fact I bought two identical models that year. I snapped the blade in two on the first one (mis-using it as a crowbar) and bought myself another. I gave to first away to a mate who ground the blade so that it looked like a half-scale model of its former self. I then proceeded to snap the tip off the second one (see the photo below- hope I've added the image properly) but I kept it and reshaped the blade as you (hopefully) can see. The knife has a single blade, a saw, an awl and a corkscrew. At the tip of the saw there is a screwdriver, a crown-cap opener and it can also be used to open tin cans.
I've 'lost' this knife twice but thankfully it's been found on both occasions, once down the sofa in my girlfriend-at-that-time's house and once I left it in a café - very silly, I must have been having a bad day.
I've had this knife so long now it is like a friend and has been very useful over the years. The saw is scarily sharp even today and the blade holds a great edge. It's been well used and shows it's age a little but it is still in perfect working order.