This is the Jaeger-LeCoultre Master Calendar, reference Q1558421. The case measures 39mm, it is 10.7mm thick, and 46.9mm from lug to lug. This self-winding automatic watch features a 39mm stainless steel case surrounding a Meteorite dial on a black alligator strap with a stainless steel deployant buckle. Functions include hours, minutes, small seconds, day, date, month and moon phase.
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