SAKWiki - The online Swiss Army Knife Encyclopedia. Information and Identification on Swiss Army Knives by Victorinox and Wenger.
Now up on my list of "things to want" is a Victorinox knife designed specifically to open watches.
The Watch Case Opener is an 84mm Swiss Army Knife from Victorinox. It is available in both 84mm frame and scale types: Slim/smooth Alox and traditional/Cellidor.
The custom-designed watch-case opener blade is used to open the back of watches that use a snap-back, or pressure fit, case.
These special-purpose models are usually made for jewelry and watch companies and include company advertising on the scales. They are available for purchase from various watch companies.
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And for those who don't mind discontinued models from Wenger, there's the Minathor, which has even more watch tools.