Victorinox Watch Opener Elinox

Sought after ELINOX  branded knives 

The Watch-Case Opener, or Case-Back knife, is designed for the horology industry. The special blade is used for opening watches with a pressure fit (snap-back) case.
Both Swiss Army Knife manufacturers have produced these special purpose blades for a long time.
Most models featuring this tool are advertising premiums made for various watch-makers and jewelers. Normally, these are small Alox scaled models, however, the tool is also found on the largest collector's versions of the Swiss Army Knife.