Jaeger LeCoultre Master Control Calendar Day Date MoonPhase 147.8.41.S Q151842A

It all started during the winter of 1930-1931. While travelling in India, the Swiss businessman and watch collector César de Trey attended a polo match at a club of British army officers. One of these officers, who had just broken the glass of his watch, challenged de Trey to create a watch model robust enough to resist to a polo match. César de Trey discussed the idea with Jacques-David LeCoultre, the then owner of the LeCoultre manufacture, who could provide the movements for the new watch. LeCoultre appointed the firm Jaeger S.A. for the creation of the reversible case, which in turn contracted the French designer René-Alfred Chauvot, the actual inventor of the unique slide and flip mechanism. The result was an elegant watch with a dial that could flip, protecting it from shocks while offering a case back with a generous surface that could be used for personalization.

This is a stainless-steel Jaeger-LeCoultre Master Calendar 147.8.41.S. It has an alligator leather strap with a stainless-steel folding deployment clasp and scratch resistant sapphire crystals. It includes a pull-out signed winding crown, and a corrector on the left-side case band at 8 o'clock, and two more at 2 and 4 o'clock for the date function. It includes an exhibition sapphire crystal display case back secured with four screws engraved with "JAEGER LECOULTRE – SWISS MADE – MASTER CONTROL -1000 HOURS – 5 ATM," and a serial number.

The 40mm diameter round 3-body case, curved lugs, and flat angled bezel. The dial is called satin silver with applied stainless-steel dart hour index markers, luminous dots, and frosted steel dauphine sword hour and minute hands. There are black perimeter Arabic numerals for the radial date, and there is a red crescent-tipped indicator hand. It has an arched power reserve indicator of 12 o'clock with a sword blued hand, and there are steel-framed day and month aperture windows at 9 and 3 o'clock. A recessed large moon phase subsidiary dial with a blued sword indicator hand is at 6 o'clock. It's water resistant to 50 meters, it has a 40-hour power reserve at full winding window.

This Jaeger-LeCoultre Master Calendar 147.8.41.S has a mechanical automatic caliber 924 movement is rhodium plated with radial Cotes de Geneve embellishment. It's constructed with 41 jewels, a shock absorber mechanism, and a straight-line lever escapement. It has a monometallic balance and a self-compensating flat balance spring. The mechanism oscillates at a frequency of 28,800 vph (4 Hz).

This is a beautiful Jaeger-LeCoultre Master Calendar 147.8.41.S was introduced in the 2000's come with JLC white box. Defiantly a collector watch. Please look at all the pictures, as they are part of the description. The watch is working and was Serviced by last owner.  The condition of the watch is the same as it appears in the photos.   The watch is working and is part of our new Certified Pre-Owned CPO Program.  Contact me if you have any questions first.