Jaeger-LeCoultre Master Control Calendar
Q4142520
2-year warranty, extendable to 8 years. Register here
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The Jaeger-LeCoultre Master Control Calendar in pink gold embodies refined watchmaking with practical complications. Featuring a triple calendar display, it presents the day and month in discreet windows at 12 o’clock, while a pointer date hand with a red-tipped crescent traces the dial’s outer edge. A moon phase indicator at six o’clock enhances both function and elegance. The silver dial, accented with gold dauphine hands and applied indices, ensures clarity and sophistication. At its heart is the Calibre 866, an automatic movement with a 70-hour power reserve, visible through the sapphire case back. The signature "jumping date" function allows the date hand to leap from the 15th to the 16th, ensuring an unobstructed moon phase view. Encased in 40mm pink gold, this timepiece is paired with a rich brown alligator leather strap. The Master Control Calendar blends tradition with modern precision, making it a distinguished companion for collectors.
Full Specification
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Brand Jaeger-LeCoultreCollectionMaster ControlSeriesN/AModel NoQ4142520
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MovementFeatures Day-Date, Moon Phase, Small Seconds, MonthMovement AutomaticCalibre 866CaseCase Size 40 mmCase Thickness 10.95 mmCase Shape RoundCase Material Rose GoldCase Back See-through Case BackLug Width 20 mmGlass Material Sapphire CrystalDialLuminosity On Hands, Hour MarkersDial Colour SilverHands DauphineStrapStrap Material LeatherStrap Colour BrownInterchangeable Strap YesClasp Type Pin BuckleBuckle/Clasp Material Rose GoldOtherEAN 7630053302917Gender MenWater Resistance (M) 50Warranty Period 2-year warranty, extendable to 8 years. Register hereCountry of Origin Switzerland
About the Jaeger-LeCoultre Master Control Collection
Introduced in 1992, the Jaeger-LeCoultre Master Control collection draws its name from the maison’s uncompromising "1000 Hours Control" certification, a rigorous series of tests that push each timepiece to the limits of precision, reliability, and durability. This meticulous approach ensures that every watch leaving the workshop meets the brand's highest standards of excellence. The collection has become a benchmark for mechanical ingenuity, showcasing Jaeger-LeCoultre’s ability to combine traditional craftsmanship with modern refinement.
Design And Features
True to its ethos, the Master Control collection is distinguished by its clean, minimalist design, favouring function over embellishment while maintaining an aura of quiet luxury. The round cases, often crafted in stainless steel or rose gold, exude timeless appeal with their slender profiles and polished surfaces. The dials, whether silvered or sunray-brushed, are meticulously laid out, featuring applied indices and dauphine hands that enhance legibility. Notable models, such as the Master Control Date, Master Control Chronograph, and Master Control Calendar, reflect Jaeger-LeCoultre’s ability to incorporate useful complications into sleek designs.
Iterations And Movements
Among the many outstanding models within the Master Control collection, the Master Control Geographic stands as a true horological gem. Combining elegance with practical sophistication, this timepiece features an innovative world time display. The second time zone can be adjusted with ease, while the city disc elegantly frames the dial, offering a harmonious balance between function and design. Another standout, the Master Control Chronograph Calendar, is a testament to the brand’s technical mastery, blending a chronograph complication with a triple calendar and moon phase, all within a streamlined case.
Powered by Jaeger-LeCoultre’s in-house automatic calibres like the 899 and 751, which are renowned for their technical innovation, boast impressive power reserves of up to 70 hours. Through sapphire crystal casebacks of some of the Master Control, wearers can admire the meticulous finishing and engineering that goes into each movement, including Geneva stripes and blued screws.

ABOUT THE MOVEMENT
The Jaeger-LeCoultre 866 calibre is a remarkable automatic movement, intricately composed of 344 individual components housed within a single barrel. This finely engineered mechanism is powered by 34 jewels and operates at a frequency of 28,800 vibrations per hour. With an impressive power reserve of 70 hours, the calibre achieves a strikingly slender profile of just 6.15mm. Its aesthetic appeal is enhanced by elegant Cote de Genève and perlage decorations, complemented by distinctive bluish screws. This calibre supports a range of functions, including hours, minutes, and small seconds, as well as day, month, and moon phase complications, making it an ideal and dependable partner for select Master Control watches.

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- Brand Jaeger-LeCoultre
- Reference 866
- Movement Automatic
- Display Analog
- Power Reserve approx. 70 hours
- Jewels 34
- Frequency 28800 bph
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