Jaeger-LeCoultre Duometre à Spherotourbillon
Duomètre à Sphérotourbillon
Technical specifications
Movement Mechanical manually-wound Jaeger-LeCoultre Calibre 382, crafted, assembled and decorated by hand, nickel silver bridges and mainplate
2 barrels
50-hour power reserve
460 parts
55 jewels
10.45 mm thick
33.70 mm in diameter
Sphérotourbillon 105 parts
Tourbillon carriage: grade 5 titanium
Total rotation speed: 30 seconds for a complete revolution
2 combined movements. Carriage axis rotation speed: 15 seconds for a complete revolution. Carriage rotation speed: 30 seconds for a complete revolution
Carriage inclination: 20°
Carriage diameter: 11.50 mm
Carriage mass: 0.518 grams
14-carat gold balance with eccentric inertia blocks in 14-carat gold, inertia = 12.5 mg.cm2 , 21,600 vibrations per hour
Cylindrical balance-spring
Functions Hours (travel time), minutes and small seconds with flyback function
Power reserves (indications and movement)
Pointer-type date display
24-hour reference time-zone
Sphérotourbillon
Case 18-carat pink gold
Diameter: 42 mm
Thickness: 14.1 mm (including the sapphire crystal)
Polished and satin-brushed finish
Domed glareproofed front and back sapphire crystals, hardness n°9
Water resistance : 5 bars
Dial Crystalline grained
pink gold appliques
Hands Hours and minutes: “leaf” type
Small seconds: baton type with pear-shaped counterweight, blued steel
Crown: One crown to wind the watch, set the time (travel time-zone), adjust the date and adjust the travel time-zone
One push-piece at 2 o’clock to activate the small seconds flyback mechanism
Strap Hand-sewn crocodile leather, 18-carat pink gold pin buckle
Reference: 605 25 20
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