Master Ultra Thin Réserve De Marche Automatic 39mm Stainless Steel and Alligator Watch, Ref No. Q1378420

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Editor's Notes

Crafted at the Le Sentier workshop in Switzerland's Vallée de Joux, Jaeger-LeCoultre's watches are subject to 1,000 hours of rigorous testing until the brand's quality controllers are satisfied - it's this attention to detail that's earned the Maison the prestigious title of 'The Watchmaker of Watchmakers'. This 'Master Ultra Thin Réserve De Marche' model has an impressively slim case cast from polished stainless steel. The silvered-grey dial features refined dauphine hands that complement the angular indices, along with date and power reserve indicators, all the while maintaining a neat, simplistic appearance. You'll find that the leather-backed alligator strap grows increasingly supple with wear.

We offer an eight-year warranty for all working parts and manufacturing faults for Jaeger-LeCoultre watches. For more information, contact one of our experts by emailing watches@mrporter.com

Details & Care


  • Swiss-made calibre 938/1 automatic movement with 43-hour power reserve
  • 41 jewels, 28,800 Vph


  • Hour and minute hands
  • Date, seconds and power reserve sub-dials


  • Silvered-grey dial
  • Rhodium-plated dauphine hands, indices and markers


  • Stainless steel case
  • Crown for date and time adjustments and manual winding
  • Sapphire glass crystal
  • Exhibition case back
  • Pin buckle-fastening black alligator strap


  • Case diameter: 39mm; case thickness: 9.9mm
  • Water resistance: 5 bar
  • Comes in a presentation box
  • Alligator: USA
  • Reference number: Q1378420
  • Made in Switzerland
Product Code 19971654706807842

Returns or Exchanges

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