Longines Sei Tacche

Longines “Sei Tacche”

Military Charm | Cal. 12.68Z | ca. 1940s

A true icon of early tool-watch design. The Longines “Sei Tacche”,  named after the six notches (sei tacche) on its screw-down caseback, represents the brand’s pioneering efforts in water-resistant wristwatches well before such features became industry standard.

This example stands out with an original cream dial showing a beautifully even patina, Arabic numerals, heat-blued hands, and a small seconds sub-dial, all hallmarks of authentic 1940s military style.

Powered by the reliable hand-wound Longines Caliber 12.68Z, and housed in a well-preserved stainless steel case, this piece remains unpolished, unrestored, and full of character. A true collector’s item,

honest, rare, and historically important.

Specifications

• Brand: Longines
• Model: Sei Tacche
• Year: ca. 1940s
• Case Material: Stainless steel
• Caseback: Screw-down with six notches (“sei tacche”)
• Case Diameter: Approx. 33 mm
• Movement: Manual-winding, Longines Caliber 12.68Z
• Dial: Original cream dial with Arabic numerals and small seconds
• Hands: Heat-blued steel
• Condition: Very good vintage condition unpolished, original dial with patina
• Notes: Military-era tool watch with untouched charm and mechanical honesty