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Jaeger-LeCoultre Master Calendar Steel (1558421)
The Jaeger-LeCoultre Master Calendar (ref. 1558421) features the JLC Caliber 866 mechanical automatic movement with a 43-hour power reserve when fully wound; gray meteorite dial with appliqued hour-markers; pointer-type date display by central hand; day-of-the-week and month apertures; moonphase aperture combined with small seconds subdial at 6 o'clock; sapphire-crystal, exhibition case back; and 39mm (10.6mm thickness), stainless steel case on a black alligator strap with a stainless steel deployant clasp.
|Strap / Bracelet||Black alligator strap|
|Complications||Date, Moon Phases, Seconds Subdial|
|Buckle||Steel deployant clasp|
|Warranty||Jaeger-LeCoultre 2-Year International Warranty|