Adhering to the relentless pursuit of precision timekeeping and dedicated to adding practical functionality to its works, Jaeger-LeCoultre's Grande Maison workshop keeps pace with the times by continuously improving its in-house movements with advanced technology. The 938 caliber mechanical movement has undergone significant enhancements to power the next generation of timepieces. Of particular note is the increased power reserve of 70 hours, ensuring that even if the watch is not worn throughout the entire weekend, it will still have sufficient power when worn again on Monday, without the need for rewinding or resetting the time.
Power reserve is a signature complication of Jaeger-LeCoultre, first introduced in the 481 caliber mechanical movement in 1948. The Powermatic wristwatch, featuring a distinctive red and white power reserve indicator, became an important timepiece for Jaeger-LeCoultre in the early 1950s as the brand's first self-winding watch equipped with a power reserve display. The design of the Master Ultra Thin Power Reserve series wristwatch with power reserve display is similarly distinctive, with the unique power reserve indicator complementing the date and small seconds display. These three complex functions showcase the precise and intricate structure of the movements, embodying the extraordinary skills of Jaeger-LeCoultre's watchmaking masters.
