The FASS 90 (FASS is a French acronym for 'Fusil d'assaut' - the 'Assault rifle') is a 3 layer Victorinox model that adds a unique sight adjustment tool layer to the Spartan model. FASS 90 is also known as 'Victorinox Korrekturmesser für Stgw 90'.

This knife is relatively thick; there are 3 aluminum liners on each side of the middle layer.

The FASS 90 replaced the previous version made by Wenger, which was unofficially called Wenger STGW 90.

Layer Tools

• Large Knife Blade
• Small Knife Blade
• Sight adjustment tool. This layer has a unique backspring with a protrusion at the end for making scope turret adjustments
• Cap-Lifter/slotted screw-driver/wire-bender
• Can Opener/small-slotted screw-driver that works with Phillips also

Back Layer Tools

• Corkscrew
• Keyring/Split-ring attachment point
• Reamer with Sewing-eye

Scale Tools

• Tweezers
• Toothpick

Scales 

Black cellidor. The front scale has several markings that indicate how to use the sight adjustment tool.

History

This model was introduced in 2015 when it replaced the Wenger STGW 90. It was developed for Grünig + Elmiger Swiss hunting and shooting sports equipment company.

Physical Specifications

• Length: 91mm
• Width: 19.5mm
• Weight: 87.2g

Identifiers

• 03.610 - Black Cellidor scales

Related Models

• Wenger STGW 90 - older version made by Wenger. Similar tools and scales (official name unknown).

External Reference

MultiTool.org thread on the Victorinox FASS 90
Video on YouTube - Victorinox Korrekturmesser für Stgw 90 (SIG 550)