Stemming from years of research conducted by Jaeger-LeCoultre, it benefits from the latest breakthroughs in the field of sound thanks to its square-section gongs made from an exclusive secret-composition material. To enhance sound transmission, these gongs are crafted all from one piece with their heel, affixed directly to the Jaeger-LeCoultre watch glass. In keeping with the spirit of the new Grande Tradition collection, its entirely hand-decorated nickel silver mechanical movement once again testifies to the mastery of rare crafts cultivated within the Manufacture, and features a set of remarkable technical characteristics (silicon escapement visible through a magnifying glass integrated into the sapphire crystal case-back, 14-day power reserve and a variable-inertia balance). A rare piece worthy of the landmark creations in the history of the Manufacture spanning almost two centuries.
Watch tested with a new 1000 Hours Chrono certification and water-resistant to 5 ATM
Jaeger-LeCoultre Calibre 947R, created in 2009
Mechanical manually-wound movement, minute repeater, barrel torque and small seconds. Silicon escapement.14-day power reserve, 21,600 vibrations per hour, 45 jewels, 430 parts, 9.60 mm thick
Watch tested with a new 1000 Hours Chrono certification and water-resistant to 5 ATM
Jaeger-LeCoultre Calibre 947R, created in 2009
Mechanical manually-wound movement, minute repeater, barrel torque and small seconds. Silicon escapement.14-day power reserve, 21,600 vibrations per hour, 45 jewels, 430 parts, 9.60 mm thick
