Jaeger-LeCoultre Master Control Chronograph Calendar

The Jaeger-LeCoultre Master Control Chronograph Calendar, reference Q4138431, is a chronograph with a 40 mm steel case. The case measures 12.05 mm thick and is rated to 50 metres. Polished rhodium-finish numerals and hour-markers share the silvered sunray-brushed dial with baguette hands. The displays comprise date, weekday, month and moon phase indications beside a 30-minute counter. Automatic calibre 759 operates at 4 Hz with a 65-hour power reserve. The mechanism incorporates 358 components, 37 jewels and two barrels. A quick-release light-brown calfskin leather strap closes with a double folding clasp, with an additional black alligator leather strap.