Premier watch , Mechanical hand-wound .Approximately 70 hrs power reserve.Chronograph 1/4th second, 30 minutes. Vibration 28,800 v.p.h . with 27 jewels . Case material 18k Red Gold Caseback Screwed in (sapphire crystal) with 100 m (330 ft) water resistance. Bezel Fixed Crown Non screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides.