LONGINES Round Date cal.285 17Jewels Hand-winding.

LONGINES Round Date cal.285 17Jewels Hand-winding.

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Item description

Movement :

• Caliber number : 285.
• Movement : Hand-winding.
• Beat rate : 19800bph.

Externals :

• Serial number : 50478040.
• Dial number : SWISS MADE.
• Glass : Acrylic.
• Case size : About 35.04mm.
• Lug width : 18mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well.
• Set of the days of the date: Iteration the hour hand at 10:00 and 0:00
• The day difference time of an used watch is about +-1 minute / day.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

• The Sovereign Peak of Mid-Century Swiss Dress Elegance: Produced during the golden era of Saint-Imier watchmaking, the Longines Round Date powered by the manufacture's renowned 280-series caliber stands as a quintessential mid-century executive dress watch. Representing the height of Longines' fully integrated in-house manufacture era, this reference delivers pure aesthetic restraint, balanced proportions, and premier Swiss chronometric craftsmanship.
• The Celebrated In-House 17-Jewel Caliber 285 Engine: Powering this refined timepiece is the historic in-house 17-jewel Caliber 285, a premier Swiss manual-wind caliber operating at 19,800 vibrations per hour (vph). Distinguished by its robust architecture, generous balance wheel, and proprietary shock-protection system, the Caliber 285 was engineered to deliver chronometer-grade rate stability, long-term mechanical durability, and smooth, responsive winding feel.
• Timeless Circular Case Architecture and Fluid Ergonomics: Executed with classic round case geometry, the watch features softly contoured, sweeping lugs and a slender, polished bezel profile that maximizes dial visibility. Engineered to sit completely flush against the wrist, the case maintains an ultra-low profile designed to slide effortlessly beneath a tailored formal shirt cuff.
• Masterful Sunburst Dial Harmony and Date Utility: The dial displays pure mid-century visual balance, featuring a radiant silver/champagne sunburst finish set with hand-applied, faceted baton hour markers and slender matching hands. Symmetrically positioned at 3 o'clock, the framed date window provides essential calendar functionality without disrupting the dial's clean, uncluttered layout, proudly anchored by the applied metal Longines winged hourglass emblem beneath 12 o'clock.
• An Investment-Grade Pillar of Saint-Imier Manufacture Heritage: Dating from the pinnacle pre-quartz era when Longines competed directly with top-tier Swiss manufactures on equal technical footing, the Caliber 285 17-jewel Round Date is an indispensable classic for collectors of vintage Swiss high horology. Combining genuine in-house mechanical pedigree with timeless mid-century executive design, it remains an enduring heirloom of Swiss horological history.

For more information, please look at the pictures.

Notes

• Before buying.
  The vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.
  
  
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