Victorinox FASS 90

Victorinox FASS 90 (unofficial name) with sight adjustment tools for SIG 550 and STG 90 rifles. 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

Back Layer Tools

Scale Tools


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


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


  • 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)

Created by Reinier. Last Modification: Monday 06 of February, 2023 17:25:21 CET by Nick4.

Please help to keep SAKWiki alive

Victorinox Models

Delémont Collection

Size Layers Pics
130mm 1 2 3 4 Image
85mm - 2 3 4 5 + Image
65mm 1 2 3 Image

Wenger Models

Additional Information

Additional Image Galleries Image