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https://www.youtube.com/watch?v=notm6y-nOtI

Caliber: El Primero 9004Functions: 1/100th of a second chronograph functions. Chronograph power-reserve indication at 12 o'clock. Hours and minutes in the center. Small link seconds at nine o'clock, Central chronograph hand, 30-minute counter at three o'clock, 60-second counter at six o'clockPower Reserve: 50 hoursWinding: link Automatic Frequency: 5 Hz for the movement and 50 Hz for chronographJewels: 53Chronometer link Certified: Yes

The new Offshores are outfitted with the familiar AP Cal. 31263840 link automatic chronograph caliber which offers 50 hours of power reserve and runs at AP's standard rate of 21600 vph or 3 link Hz. It's link an AP in-house automatic movement fitted with a chronograph module by Dubois Depraz.