Item Description:Up for sale is a beautiful vintage Wenger S.A.K. (Swiss Army Knife) Design square tank watch. This is a highly collectible and rare variant from the late 1990s. It features the famous, quirky math dial where the 12 o'clock marker is replaced with a playful "11 + 1" equation.

The watch is in excellent vintage condition with minimal signs of wear. It has been thoroughly cleaned, carefully tested, and features a brand-new battery installed in June 2026. It is running flawlessly and keeping perfect time!

Brand: Wenger (Swiss Made)Line: S.A.K. Design

Style: Square "Tank" Dress / Casual Watch

Dial Color: Black with luminous hands and a unique 11+1 marker

Case Material: Brushed Stainless Steel

Strap: Original black leather padded strap

Movement: Reliable Swiss Quartz (Battery Operated)

Condition: Excellent vintage shape. Clear crystal, clean case, fresh battery!