174

The spherical 'Gyrotourbillon' is one of Jaeger-LeCoultre's emblematic complications. Featuring such, caliber 174 consists of 373 parts and has a power reserve of 50 hours. Data on the tourbillon: * Outer carriage: aluminium, 60 seconds for a complete rotation * Inner carriage: titanium and aluminium, 18.75 seconds for a complete rotation * Balance: inertia of 12.5 mg x cm2 * Balance frequency: 28,800 vibrations per hour * Parts:100