The Girard-Perregaux Opera One is an Haute Horlogerie watch that combines two of the most distinguished and complex complications: the minute repeater and the Tourbillon. As an additional sophistication, the minute repeater function chimes with a “Westminster” carillon based on the use of four different gongs.
The absence of dial allows a view of three of the four chime hammers in action.This complication model is equipped with GPME9899 manual winding movement that has a power reserve of 75 hours. Models are available in Pink gold, white gold or platinum.
GPME9899, manual winding
Diameter: 27,60 mm
Height: 7,69 mm
Frequency: 21,600 Vib/h – (3 Hz)
Power reserve: min. 75 h
Functions: Tourbillon, hour, minute, repeater on four gongs (hours, quarters and minutes – Westminster chime), small second on the Tourbillon
Material: Pink gold, white gold or platinum
Crystal: Antireflective sapphire
Case-back: Sapphire crystal, secured by 6 screws
Diameter: 40,00 mm
Height: 13,00 mm
Water resistance: 3 ATM
Strap size: 20,00 / 16,00 mm