Jaeger-LeCoultre Master Ultra Thin Date
Q1238480
2 Year + 6 year warranty extension by registering here
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Refined elegance meets technical finesse in the Jaeger-LeCoultre Master Ultra Thin Date. Crafted in polished stainless steel, the sleek 39mm case measures just 7.8mm thick—an ultra-slim profile that slips easily under a cuff. Its blue-grey sunburst dial evokes subtle sophistication, with refined dauphine hands and wedge hour markers enhancing its timeless appeal. The minimalistic date window at six o’clock maintains visual harmony, while the slightly curved lugs offer ergonomic comfort. Powering the watch is the in-house Calibre 899, visible through the sapphire caseback and finished with Geneva stripes, bevelled edges, and blued screws. This timepiece exemplifies Jaeger-LeCoultre’s dedication to understated luxury, making it a perfect companion for the modern gentleman who values classic design and mechanical precision.
Full Specification
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Brand Jaeger-LeCoultreCollectionMaster Ultra ThinSeriesN/AModel NoQ1238480
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MovementFeatures DateMovement AutomaticCalibre 899CaseCase Size 39 mmCase Thickness 7.89 mmCase Shape RoundCase Material SteelCase Back See-through Case BackLug Width 18 mmGlass Material Sapphire CrystalDialDial Colour BlueHands DauphineIndexes WedgeStrapStrap Material LeatherStrap Colour BlackInterchangeable Strap YesClasp Type Double Folding BuckleBuckle/Clasp Material SteelOtherGender MenWater Resistance (M) 50Warranty Period 2 Year + 6 year warranty extension by registering hereCountry of Origin Switzerland
About the Jaeger-LeCoultre Master Ultra Thin Collection
The Jaeger-LeCoultre Master Ultra Thin collection epitomises the art of minimalist design, marrying elegance with technical mastery. This exquisite range celebrates the brand’s prowess in crafting remarkably slender timepieces that seamlessly blend form and function. With profiles impressively thin—often less than 7 mm—each model offers sophisticated wearability, making them ideal companions for those who appreciate discreet timepieces that can be easily tucked under the cuffs.
Features
Distinguished by their refined aesthetic, the Master Ultra Thin collection showcases dials that favour simplicity and clarity. The hour markers, often crafted from precious materials, add a touch of luxury while maintaining legibility. The graceful dauphine hands glide effortlessly across the surface, emphasising the collection's commitment to precision. Many models feature a polished or satin-brushed case finish, enhancing their sophisticated appearance. Notably, the collection utilises high-quality materials such as stainless steel and pink gold, ensuring durability alongside elegance. A variety of strap options—including classic leather and luxurious alligator—allow for personalisation while complementing the watch’s slender profile.
Notable Iterations
Among the most celebrated models, the Master Ultra Thin Moon stands out for its elegant blend of simplicity and complexity, offering a moon phase display alongside the time. Its clean lines and refined design make it a popular choice for both formal and casual occasions. The Master Ultra Thin Date highlights the collection's simplicity while incorporating a date function, making it a practical choice for daily wear. Furthermore, the Master Ultra Thin Perpetual Calendar showcases the brand's horological ingenuity, elegantly combining perpetual calendar functions with a remarkably slim profile, making it a true masterpiece of modern watchmaking.

ABOUT THE MOVEMENT
With its sleek 4.64mm build, this movement powers watches in the widely-popular Polaris and Master Ultra Thin collections. Each calibre 899 undergoes a rigorous testing program known as '1,000 Hour Control', where the movement is tested before and after casing. Only the calibres that meet the stringent standards of the maison leave the factory, a proof of this manifests in the form of a seal on the caseback. Calibre 899 is an ultra-thin self-winding movement with a 38-hour power reserve. It is used in Jaeger-LeCoultre watches with a basic three-hand display and a date feature. Displayed through the sapphire crystal, the impeccable mechanism of the Jaeger-LeCoultre calibre 899 features 32 jewels and operates at a beat rate of 28,800 vph. Last but not least, the Geneva stripes and bluish screws elevate the allure of the mechanism.

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- Brand Jaeger-LeCoultre
- Reference 899
- Movement Automatic
- Display Analog
- Power Reserve Approx. 38 hours
- Jewels 32
- Frequency 28,800 bph
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