This watch was said to be the 1st wristwatch to feature a calendar display. The 30mm LeCoultre 'Duo Date' 2701 features a 10k gold-filled case. The dial layout isolates the day of the week within a rectangular aperture beneath the twelve o'clock position, while a central hand tipped with a red arrow indicates the date along a numerical track. Powering the dual calendar complication is the manual-winding Caliber 412.
Since its founding in Switzerland's Vallée de Joux in 1833 by Antoine LeCoultre, Jaeger-LeCoultre has established itself as a true manufacture, bringing nearly every aspect of watchmaking under one roof. This comprehensive in-house capability has earned it the esteemed title of "the watchmaker's watchmaker," as it historically supplied movements to many other prestigious brands.
The brand's portfolio is defined by both profound technical mastery and iconic design. Jaeger-LeCoultre is responsible for horological milestones such as the Calibre 101, which remains the world's smallest mechanical movement, and the near-perpetual Atmos clock, powered by minute changes in ambient temperature. Perhaps its most recognizable creation is the Reverso, a watch born from the need for a durable timepiece for polo players in 1931, which features a unique swiveling case that has become a celebrated icon of Art Deco design.
Overall Grade: 7 / 10 | Good, Medium Wear Production: est. 1940s Contents: Watch Only Genre: Vintage Dress Watch
Size: 30mm Thickness: approx. 10mm Lug Width: approx. 16mm
Case: 10k gold-filled case, mirrored finish, medium wear Bezel: Fixed, mirrored finish, medium wear Dial: Cream patina, printed Arabic numerals, red outer date track, day aperture, small seconds, medium wear Hands: Gold-tone, sword shaped hands
Crown: Push/pull crown and hidden pusher, medium wear Crystal: Domed acrylic crystal, medium wear Bracelet: Aftermarket leather strap, medium wear Caseback: 10k Gold Filled, solid snap-on, medium wear Movement: Manual wind Caliber: 412












