The Jaeger-LeCoultre Master Control Date Q4018420 (2020 launch) features a 40mm round stainless steel case with double polished and satin finish on sides, measuring just 8.78mm thick. The silvered grey sunray-brushed dial features polished rhodium-finished Arabic numerals and hour markers, dauphine hands with blue seconds hand, and date window at 3 o'clock. Powered by the new generation Calibre 899 automatic movement with silicon escapement and redesigned barrel, offering improved energy efficiency and 70-hour power reserve. Movement comprises 218 parts and 32 jewels, beating at 4Hz (28,800 vph). Exhibition sapphire caseback showcases the movement. Light brown Novonappa® calfskin leather strap with stainless steel folding deployant buckle.