Technical specifications for World Wide Time Control John Harrison limited edition (ww.tc John Harrison):
Case in white gold
Diameter: 41 mm
Height: 11 mm
Crystal: antireflective sapphire
Case-back: sapphire crystal, secured with six screws
Water resistance: 50 metres
Dial in champlevé enamel
Girard-Perregaux GP033G0 movement
Mechanical with automatic winding
Calibre: 11 ½ ’’’
Frequency: 28,800 vibrations/hour (4 Hz)
Jewels: 26
Power reserve: minimum 46 hours
Functions: hours, minutes, display of world times with day/night indicator
Black alligator strap
Folding clasp in white gold
The ww.tc John Harrison is available in a limited series of 50 individually numbered timepieces.