The BREITLING Premier B01 Chronograph 42 is equipped with the in-house conceived and manufactured Calibre B01.
As all Breitling watches it is an official certified chronometer. This is a precision instrument that has successfully passed all tests imposed by COSC (Swiss Official Chronometer Testing Institute), a neutral and independent body which individually tests each movement according to the prescriptions in force.
The certification test for wristwatches with sprung balance oscillators, according to standard ISO 3159, consists of observing each movement for 15 days and 15 nights, in 5 positions and at 3 different temperatures (8°C, 23°C, 38°C). In order to earn the prestigious chronometer label, a movement’s performances must meet 7 very strict criteria, including a daily variation in rate ranging between only -4/+6 seconds.
Calibre
Breitling Manufacture Calibre 01
Diameter: 30 millimeters
Depth: 7.2 millimeters
Winder: automatic with dual-acting ball-bearing rotor at least
Power reserve: 70 hours
Number of components: 346
Balance frequency: 28,800 A/h (= 4 Hz)
Chronograph: ratchet wheel control, vertical coupling, 30-minute and 12- hour counters
Display: minute, second, window date
Certification: COSC-certified
Case
Material: stainless steel
Diameter: 42 millimeters
Height: 13.65 millimeters
Water resistance: 10 bar/100 meters
Glass: sapphire, convex, double anti-reflective
Case-back: screwed steel, sapphire glass
Crown: non-screw-locked, two gaskets
