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Master Ultra Thin
Power Reserve

39 mm Automatic Steel Power Reserve Ultra Thin Watch
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Faithful to the emblematic watchmaking spirit of the collection, the Master Ultra Thin Power Reserve watch epitomises the subtle blend of technical prowess and aesthetic refinement. In this understated stainless steel version, the case with its curved lugs features a dial with unique architecture - a signature element of the model. The elongated hour-markers, double polished and satin-finished Dauphine hands, Jaeger-LeCoultre applied logo, opaline counters and minute track dots stand out harmoniously against the silver sunrayed background. The in-house Calibre 938 lies at the heart of the watch, equipped with a silicon escapement offering a power reserve of 70 hours, providing real comfort: there is no need to wind the watch, even after a whole weekend without wearing it. Beneath its slender case, which reflects the watchmaking expertise of La Grande Maison, this high-precision watch defies times with as much boldness as sophistication.

  • Case

    Stainless steel
    Diameter: 39 mm
    Thickness: 8.95mm

    Water resistance

    5 bar

    Dial

    Rhodium-plated hour-markers, Silvered grey, sunray-brushed

    Strap

    Alligator leather, Black
    Interchangeable: Yes
    Lug width: 21mm
    Standard strand length at 12h: 75mm
    Length 6h: 120mm

    Buckle

    Double Folding Buckle
    Stainless steel
    Buckle width: 18mm

    Jaeger-LeCoultre Calibre 938

    Functions

    Hour - Minute, Date, Power-reserve, Seconds

    Movement

    Automatic winding, Components: 262, Vibrations per hour: 28800, Jewels: 39, Barrel: 1, Thickness: 4.97mm, Power reserve: 70 hours
    Jaeger-LeCoultre Calibre 938
    Maintenance advice
  • The Jaeger‑LeCoultre Care Program will provide you with personalized product information, advice, services and the ability to register for an extension of your International Limited Warranty up to 8 years.
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Color and material variants

Power Reserve
Power Reserve

Overview

The sophisticated watchmaking collection

The Master Ultra Thin watch collection epitomises Jaeger-LeCoultre’s philosophy of uniting technical virtuosity with timeless aesthetics. It reimagines traditional complications with designs that feature rich, clean lines. The entire collection showcases our exceptional watchmaking savoir-faire.

Heritage

A legacy of mastering thin calibres

Already renowned for its complicated pocket-watches, the new challenge of the twentieth century led Jaeger-LeCoultre to make one of the most prodigious collections of ultra thin calibres in watchmaking history.

Made in our Manufacture

From its calibre to its case, every Jaeger‑LeCoultre luxury watch is designed, manufactured and assembled under one roof, at our Manufacture in the Vallee de Joux. Our obsession with quality is renowned as every Jaeger‑LeCoultre model undergoes strict “1,000 Hour Control” testing. This unique program provides internal certification tests that far exceed official chronometry tests.

It includes movement testing before and after casing and extends throughout assembly, according to conditions that match daily wear. A quality seal is engraved on the back of every watch once it meets our strict standards.

After-sales services
After-sales services
Discover our maintenance available services in order to take care of your watch or your Atmos.
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Up to 8 years of warranty
Up to 8 years of warranty
Discover the Jaeger-LeCoultre Care Program and extend your warranty up to 8 years.
Know more
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Up to 8 years’ warranty