The Victorinox Waiter Plus is a single layer 91mm Swiss Army Knife.
Very similar to the 84mm Waiter, it adds the Plus scale tools, and the mini-screwdriver in the corkscrew. Quite a few tools for a slim model.
This model appears to be the only single-layer model with a 91mm frame size (although there may be a 91mm Gourmet model). There may be other historical or advertising models, like the Victoria branded 247(U) model from the 1940s.

Layer Tools

• Large blade
• Combo-opener tool - functions as a bottle opener/cap lifter, can-opener, screwdriver, and wire stripper

Back Layer Tools

• Corkscrew
• Mini-screwdriver
• Keyring

Scale Tools

• Toothpick
• Tweezers
• Removable ballpoint pen
• Straight pin

Scales

Red Cellidor

History

This model was apparently only available for a short time and is not very common.

Variations

Older versions (dating back to the 1940) may have a blade that is mirrored with the can opener on the front of the blade
(Ed. Note: Comment to be clarified)

Physical Specifications

• Length: 91mm

Identifiers

• 1.3305: Red Cellidor scales
• 247: Older version dating back to the 1940s, without any scale tools. Can-opener versions may vary depending on age
• 247U: Same as the 247 but with a bail

Related Models

• Compact - Adds scissors and a multi-purpose hook
• Waiter - An equivalent 84mm model without the pen, pin, or mini-screwdriver