Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar
Q114842J
2-year warranty, extendable to 8 years. Register here
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The Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar embodies horological precision in an ultra-slim stainless steel case. Measuring 39mm in diameter, its sunray-brushed silver dial presents a well-balanced layout, featuring a perpetual calendar with date, day, and month subdials alongside a moon phase display at 12 o’clock. Powered by the in-house Calibre 868, this timepiece delivers an impressive 70-hour power reserve while maintaining its sleek, sophisticated profile. Dauphine hands, elongated hour markers, and a polished JL logo accentuate its refined aesthetic. The slim lugs ensure a comfortable fit, making this timepiece a seamless blend of technical mastery and timeless elegance.
Full Specification
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Brand Jaeger-LeCoultreCollectionMaster Ultra ThinSeriesN/AModel NoQ114842J
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MovementFeatures Day-Date, Moon Phase, Perpetual Calendar, Month, YearMovement AutomaticCalibre 868CaseCase Size 39 mmCase Thickness 9.2 mmCase Shape RoundCase Material SteelCase Back See-through Case BackLug Width 21 mmGlass Material Sapphire CrystalDialDial Colour SilverHands DauphineStrapStrap Material LeatherStrap Colour BlackInterchangeable Strap YesClasp Type Double Folding ClaspBuckle/Clasp Material SteelOtherGender MenWater Resistance (M) 50Warranty Period 2-year warranty, extendable to 8 years. Register 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
Introduced in 2013, Jaeger-LeCoultre calibre 868 is a slim, automatic movement, measuring only 4.72mm in thickness. It brings a reliable perpetual calendar complication featuring sub-dials for date, month, day, and moon phase in addition to central hour, minute, and second. Further, it also displays a four-digit year window along with an adjustment warning indicator. This perpetual calendar will work flawlessly till 2100. Calibre 868 features an oscillation frequency of 28,800bph and a 70-hour power reserve from a single barrel.
The calibre is composed of 330 components, including 46 jewels. It is adorned with the Côtes de Genève pattern on the bridges, circular graining on the mainplate, and bevelling and polishing on the edges. It is complete with a rose gold rotor engraved with the brand’s logo.

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- Brand Jaeger-LeCoultre
- Reference 868
- Movement Automatic
- Display Analog
- Power Reserve Approx. 70 hours
- Jewels 46
- Frequency 28800 bph
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