The heart of the watch
movements
As an independent and vertically integrated manufacturer, Patek Philippe develops and produces its own calibers. Our current collection features around 50 variants of base calibers, either mechanical (manual or automatic) or electronic (quartz), whose details are accessible by clicking on each individual caliber below.
Quarter rack
Serves to chime quarter-hours by means of pallets activating the hammers
Strikework bridge
Bears the pivots of the strikework gear train
Weeks lever
Triggers the week jump during the night between Sunday and Monday.
Clutch lever
Serves to engage or disengage the chronograph mechanism
Gold third wheel
Going train wheel meshing with the tourbillon carriage
48-Month cam
Takes account of the variable duration of months and leap years
Minute Repeater Hammers
Strike the hours and minutes gongs of the minute-repeater mechanism
Chronograph Hammer
Serves to reset the chronograph hands
Tourbillon bridge
Bears the upper pivot of the tourbillon carriage
Inertia flywheel bridge
Bears the upper pivot of the strikework’s inertial flywheel
Months clicks spring
Keeps in position the pawl associated with the months lever
Split-seconds clamp spring
Keeps the split-seconds clamp in tension when activated
