Longines Chronograph Caliber 13ZN – Rare Vintage Swiss Chronograph Stainless Steel 1930s Offered is a highly collectible Longines chronograph equipped with the legendary Caliber 13ZN movement, one of the most celebrated chronograph calibers ever produced by Longines. Introduced in the 1930s, the 13ZN is regarded as a milestone in Swiss chronograph development and remains highly sought after by collectors worldwide. The watch features a 36 mm stainless steel case with an original pressure-fit caseback, a smooth bezel, and a beautifully aged dial with attractive period patina. Roman numeral hour markers and original blued steel hands contribute to its authentic vintage character. Inside is the original Longines Caliber 13ZN manual-winding chronograph movement, preserved with its original components and professionally serviced. The watch is fitted with an 18 mm leather strap and original buckle. Specifications: * Brand: Longines * Model: Chronograph * Movement: Longines Caliber 13ZN * Type: Mechanical manual-wind chronograph * Country of origin: Switzerland * Case material: Stainless steel * Case diameter: 36 mm (excluding crown) * Crystal: Plexiglass * Dial: Original dial with vintage patina * Hour markers: Roman numerals * Hands: Original blued steel * Strap width: 18 mm Included in Sale: * Longines chronograph watch * Presentation velvet pouch Condition: Very good vintage condition. Professionally serviced and fully functional. The dial displays attractive age-related patina consistent with its age. Please review all photographs carefully for the exact condition. A rare opportunity to acquire a historically important Longines chronograph powered by the renowned 13ZN movement, considered one of the finest vintage chronograph calibers ever manufactured.