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Jaeger-LeCoultre Master Calendar Ref. 140.2.98.S


Pre-Owned Jaeger LeCoultre 37mm Master Calendar, Black Dial, Black Leather Strap, Ref. 140.2.98.S

This 37mm Jaeger LeCoultre Master Calendar features an 18k rose gold smooth bezel set in an 18k rose gold case with a scratch resistant sapphire crystal. The case displays a black dial with a dedicated pointer date hand, a month and day of the week reference, as well as a moon phase and small seconds reference at the 6 hour. Powered by a self winding 891/448 caliber movement, which offers a 40 hour power reserve. Attached to the case is a black leather strap with an 18k rose gold folding clasp. This Master Calendar comes complete with service box and 2023 documents showing full factory service by JLC, including a new original JLC strap.

Only 1 left in stock

Categories: , , SKU: 210000005850

Additional information

Band Color


Band Material


Band Type



18k Rose Gold

Box and Papers

Box, Service Papers





Case Material

18k Rose Gold

Case Size





Date, Day, Small Seconds, Moon Phase, Month

Crystal Material


Dial Color





35mm – 39mm


Factory Warranty

Item ID0005850
Model #140.2.98.S
Model NameMaster Calendar
Serial NumberJ1XXXXXX


The Jaeger LeCoultre Reverso watch was born out of a request to produce a watch that would survive a polo match.  JLC’s answer was a watch that flipped, or reversed, to expose a hard steel exterior to the playing field while hiding the more fragile crystal towards the player’s wrist.  The result was the iconic Reverso.  This GMT Reverso Grande Automatic includes several features on its silver guilloche dial, including the double window date at the 11 hour, a GMT hand that can also be hidden behind the hour hand when not used, and a day/night indicator in the sub-seconds hand at the 6 o’clock position.  As with other JLC Reversos, the watch case reverses on the strap to reveal a flat steel plate suitable for engraving and personalization.

Jaeger-LeCoultre (JLC), the watchmakers’ watchmaker, may not be as recognized by the public who are more familiar with the holy trinity of watchmakers, Audemars Piguet, Patek Philippe and Vacheron Constantin.  It often comes as a surprise to learn that JLC has supplied movements not only to all three, but also to others, including the formidable Breguet and Cartier.  As one of the few modern Swiss watchmakers who still make their own movements, cases, hands and other parts, Jaeger-LeCoultre watches present an exceptional value.

The LeCoultre family traces its history in Switzerland to 1558, when Pierre LeCoultre immigrated from France, then moved to the Vallee de Joux the following year.  After his son built a church in the valley, a town grew and eventually became the home of today’s JLC company.  The first LeCoultre watchmaking workshop was founded in 1833, following Antoine LeCoultre’s invention of a machine that increased the production of small watch parts.  Antoine’s son gradually brought together the hundreds of small workshops in the area by installing a steam-driven power source in 1866.  With that access to power, LeCoultre gathered into one building all the skills necessary to produce a watch, after which the building became known as the “Grande Maison of the Vallee de Joux.”  From the Grande Maison came smaller and more complex movements that were also used by other watchmakers, including Patek Philippe.

The LeCoultre company began the transition to the Jaeger-LeCoultre watchmaking company in 1903, when a Parisian watchmaker named Edmond Jaeger issued a challenge to Swiss watchmakers to produce an ultrathin movement that he had invented.  LeCoultre successfully meet the challenge with the caliber 145, which allowed Edmond Jaeger to sign a contract with Cartier (the “Jeweler of Kings, King of Jewelers”) to give Cartier exclusive access to Jaeger’s watch movements for the next fifteen years, movements that were produced by LeCoultre.  The collaboration proved so successful that in 1937, the two watchmakers formed the Jaeger-LeCoultre company.  Since the Grande Maison first began producing watches, JLC has created more than 1200 calibers.  They continue to advance the art of watchmaking with complications that power some of the world’s finest watches.