Based on the in-house chronograph caliber 4401 released in 2019 in the Code 11.59 by Audemars Piguet collection, the caliber 4407 has been deeply re-engineered to improve its energy management in order to allow the addition of the split-seconds mechanism. In addition to this, a new oscillator has been developed which features a Breguet overcoil, whose sharply curved outer end ensures the concentric development of the balance spring for increased accuracy.
Caliber: 4407
Release Date: 2023
Country: Swiss made
Type: Automatic
Dimensions: 32mm/8.92 mm
Total Components: 638
Jewels: 73
Oscillating Frequency: 4Hz (28,800 VPH)
Power Reserve: 70 hours
Functions: hours, minutes, small seconds, large date, flyback chronograph, split-seconds chronograph, GMT 24-hours day/night.
Balance Wheel: Variable inertia, free-sprung
Rotor: skeletonized
Finishing: Geneva stripes, machine beveling, polishing, circular satin finishing, circular graining, perlage
Unique Features: unique oscillator, split-seconds flyback chronograph with mechanism visible on movement side, one-button 24-hour GMT
