Strange you should bring the subject up, my old Swiss Army knife turned up recently while I was looking for something else. Think I got this as a birthday present when I was 9 or 10 years old, so must now be at least 50 years old. Sadly the toothpick and tweezers are long gone and the corkscrew on the other side is broken, but seeing as then I was too young to know about the delights of wine drinking can only assume it got broken using it for something else, probably screwing into a piece of wood for the hell of it!
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Send it back to the uk returns address for Victorinox under their lifetime warranty. They will service it and replace broken parts, or will offer you a new one. All FOC.