Jaeger-LeCoultre Master Control Calendar

The Jaeger-LeCoultre Master Control Calendar, reference Q4148421, presents a 40 mm steel case with a display back. The case is 10.95 mm thick and rated to 50 metres. The silvered sunray-brushed dial carries polished rhodium-finish numerals and hour-markers, Dauphine and baguette hands, and small seconds. A central date hand shares the dial with a moon phase aperture at 6 o'clock. Automatic calibre 866 runs at 4 Hz and provides a 70-hour power reserve. Its assembly brings together 344 components, 34 jewels and one barrel. A quick-release light-brown calfskin leather strap closes with a double folding clasp, with an additional black alligator leather strap.