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Jaeger LeCoultre Master Moon Steel


Jaeger LeCoultre, Master Moon, Reference 140.8.98.S, Stainless Steel on a Strap with a Stainless Steel Deployant Buckle, Automatic, Day, Date, Month, Moonphases, Small Seconds, Display Back, Diameter: 37 mm, Thickness: 10mm, Sapphire Crystal, Water Resistant to 5 atm, Like New with Box and Papers.

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More about Master Moon Steel

This is a stainless steel Jaeger LeCoultre Master Calendar Automatic, 140.8.98.S. It has a black alligator leather strap with a stainless steel double deployant clasp, and a scratch resistant sapphire crystal. There are correctors on the band at 2 and 4 o'clock, and there is an exhibition sapphire display case back secured with 4 screws. The calendar is in English. The 37mm diameter solid two-body case, downturned lugs, and angled bezel are polished. The dial is black with applied steel Arabic numeral hour markers at 3, 9, and 12 o'clock, and faceted dart indexes. It has dauphine hands with luminous inserts, and luminous dots at the quarter hours. The date is indicated with a center hand that has a red-crescent shaped indicator on the tip; it corresponds to the Arabic numeral dates that are printed in white on the perimeter of the dial. There is a moon phase indicator at the 6 o'clock position, with a yellow gold moon, and 4 yellow gold stars. The moon’s phases are tracked using the numbers surrounding the display, from 0 to 29 ½ days. The day of the week and the month are displayed in red in two rectangular windows under the logo at 12 o’clock. It's water resistant to 50 meters/165 feet, and it has a power reserve of 32 hours at full wind. It has undergone the full 1000 hours of rigorous testing before it left the Jaeger LeCoultre factory. The 10mm thick case, dial, and movement are all signed. The mechanical automatic self-winding Jaeger LeCoultre caliber 891/448 movement is rhodium-plated, with fausses cotes embellishment, and it's fitted with a pin regulation system. It's constructed with 36 jewels, 275 components, and a shock absorber mechanism. It includes a straight-line lever escapement, a monometallic balance that's adjusted to 6 positions, and a self-compensating flat balance spring. It has a 22K gold rotor segment. The rotor is made from stainless steel with a 22 carat yellow gold segment mounted to its outer edge to give it the most efficient winding weight. The movement oscillates at a frequency of 28,800 vph (4 Hz).

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