Jaeger-LeCoultre Master Control Calendar

The Jaeger-LeCoultre Master Control Calendar, reference Q4148120, uses a 40 mm steel case with curved lugs. The case measures 10.95 mm thick and is rated to 50 metres. A silvered sunray-brushed dial bears polished rhodium-finish numerals and hour-markers, Dauphine and baguette hands, and a date display. Weekday and month indications appear in blue in central apertures, with the moon phase at 6 o'clock. The bracelet has quick-release technology and a double folding clasp, with a second light-brown strap. Self-winding calibre 866 comprises 344 components, 34 jewels and one barrel. The mechanism runs at 4 Hz with a 70-hour power reserve.