Q4138180

The Jaeger-LeCoultre Master Control Chronograph Calendar Q4138180 debuted in 2025. This version features a stainless steel case of 40.0 mm in diameter, paired with a sunray-brushed blue dial. It displays the time alongside a triple calendar (day, date, month), moonphase, chronograph with 30-minute counter, and pulsometric scale. Power comes from the automatic Jaeger-LeCoultre caliber 759, a fully integrated chronograph movement with column wheel and vertical clutch, offering a power reserve of 65 hours. This watch is delivered with both a stainless steel bracelet and a blue calfskin strap, each equipped with the quick-change system.