What’s the Amplitude of a Watch?

Amplitude is how big of a swing (degrees of rotation) the balance wheel moves per oscillation. Low amplitude generally means a larger problem with the power transmission causing less than needed energy to be delivered to the escapement.

What do jewels in a watch movement do ?

Higher grade watches have traditionally used a jeweled movements, which means that jewels (originally natural ruby, now synthetic ruby) were actually used in the movement. These jewels are functional – they are used as the bearings for the wheel trains and in high wear parts such as the escape lever and impulse jewel.

What is watch hacking ?

Watch hacking, otherwise referred to as the second hand halt mechanism or seconds stop function, is a feature that allows the watch wearer to stop the movement at will. This is normally accomplished by pulling the crown out to its time-setting position, causing the hacking lever to stop the balance wheel and gear train of the watch. Whereas an automatic watch will continue to run whether or not the crown is pulled, a watch with the hacking feature will have the seconds hand and movement stop completely.

Complete list of Rolex Calibers

Rolex Caliber 3135

  • Jewels: 31 Jewels.
  • Specifications: Automatic mechanical movement. Duo-directional rotor. Date display. Perpetual rotor.
  • Power reserve: 48 hours.
  • Introduced: 1988.
  • Frequency: 28.800 BPH
  • Watches with this caliber: Submariner, Datejust.

The Rolex Caliber 3135 was released in 1988 and improved the durability and the reliability of Rolex’s watches. Maybe most importantly is that the new caliber made the watches easier to service.

Rolex Caliber 2231

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional rotor. Perpetual rotor. Accuracy of -2/-2 seconds per day.
  • Power reserve: 48 hours.
  • Frequency: 28.800 BPH.

Rolex Caliber 2236

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. bi-directional rotor. Date display. Perpetual rotor.
  • Power reserve: 55 hours.
  • Introduced: 2015.
  • Frequency: 28.800 BPH.

Caliber Caliber 3130

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. Accuracy of -2/+2 seconds per day.
  • Power reserve: 48 hours.
  • Frequency: 28.800 BPH.
  • Introduced: 2001.
  •  Watches with this caliber: Rolex Explorer and Datejust.

The Rolex Caliber 3130 movement is the fourth generation of the Rolex Calibre 300 family. The movement features a  Chronergy escapement as well as optimized and improved gears and lubricants which allows for a better power reserve. With the new generation 3000 Calibers, Rolex has claimed that 90{9c7f37c78d0428cda2145a6ffe5333476c25e854262b773cc5187daf4be10fbc} of the components have been changed from the previous generations.

The Rolex Caliber 3130 is not very different from the immediate predecessor. The difference between the 3130 and the 3135 movement is that the 3130 watch movement does not have a date function in any of the watch models that use it. The movement is used in Air King, some Oyster Perpetual, Explorer, and Submariner watch models.

Rolex Caliber 3255

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. Accuracy of -2/+2 seconds per day. 15{9c7f37c78d0428cda2145a6ffe5333476c25e854262b773cc5187daf4be10fbc} higher efficiency with “Chronergy”. Date and weeks display.
  • Power reserve: 70 hours.
  • Introduced: 2015.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Day-date.

Rolex Caliber 3235

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional Perpetual rotor. Date display. 15{9c7f37c78d0428cda2145a6ffe5333476c25e854262b773cc5187daf4be10fbc} higher efficiency with Chronergy.
  • Power reserve: 70 hours.
  • Frequency: 28.800 BPH.
  • Introduced: 2016.
  •  Watches with this caliber: Rolex Datejust, Sea-Dweller, Deepsea Sea-Dweller.

Rolex Caliber 3285

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. GMT function. Date display.
  • Power reserve: 70 hours.
  • Introduced: 2018.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex GMT-Master II.

Rolex Caliber 4160

  • Jewels: 42.
  • Specifications: Automatic mechanical movement. Bi-directional perpetual rotor. Regatta Timer. 360 components. Chronograph.
  • Power reserve: 72 hours.
  • Introduced: 2007.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Yacht-Master II.
  • Year Introduced: 2007.

Rolex Caliber 4161

  • Jewels: 72.
  • Specifications: Chronograph. Duo-directional perpetual rotor.
  • Power reserve: 72 hours.
  • Introduced: 2013.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Yacht-Master II.

Rolex Caliber 1161

  • Jewels: 26.
  • Specifications: No-date.
  • Power reserve: N/A.
  • Frequency: 18.800 BPH.
  • Introduced: 1964.

Rolex Caliber 1166

  • Jewels: 26.
  • Specifications: Date.
  • Power reserve: 42 hours.
  • Frequency: 18.800 BPH.
  • Introduced: 1967.

Rolex Caliber 1520

  • Jewels: 27 jewels.
  • Specifications: No-date.
  • Power reserve: 42 hours.
  • Introduced: 1963.
  • Frequency: 19.800 VPH.
  •  Watches with this caliber: Air-King.

Rolex Caliber 1560

  • Jewels: 25.
  • Specifications: No-date.
  • Introduced: 1959
  • Power Reserve: 42 Hours
  • Frequency: 18.800 BPH.
  •  Watches with this caliber: Oyster-Perpetual, Explorer, Submariner.

Rolex Caliber 3180

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. Paramagnetic blue Parachrom hairspring. Second time zone with day/night indicator.
  • Introduced: 1959
  • Power Reserve: 48 hours
  • Frequency: 28.800 BPH.

Rolex Caliber 3165

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Perpetual Duo-directional rotor. Paramagnetic blue Parachrom hairspring. Date function.
  • Power Reserve: 48 hours
  • Frequency: 28.800 BPH.

Rolex Caliber 1565

  • Jewels: 26.
  • Specifications: Date function.
  • Power reserve: 42 hours.
  • Introduced: 1959.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Oyster-Perpetual Date.

Rolex Caliber 1570

  • Jewels: 26.
  • Specifications: No date.
  • Power reserve: 42 hours.
  • Introduced: 1965.
  • Frequency: 19.800 BPH.
  •  Watches with this caliber: Oyster Perpetual, Submariner, Explorer.

Rolex Caliber 1575

  • Jewels: 25.
  • Specifications: Date. Fixed GMT hand.
  • Power reserve: 48 hours.
  • Introduced: 1965.
  • Frequency: 19.800 BPH.
  •  Watches with this caliber: GMT-Master II & Explorer II.
  • Year Introduced: 1965.
  • Power Reserve: 42 Hours.

Rolex Caliber 1580

  • Jewels: 26.
  • Specifications: No date. movement made for Milgauss.
  • Power reserve: 50 hours.
  • Introduced: 1963.
  • Frequency: 19.800 BPH.

Rolex Caliber 1602

  • Jewels: 20.
  • Specifications: No date. Manual wounded.
  • Power reserve: N/A.
  • Introduced: N/A.

Rolex Caliber 2030

  • Jewels: 28.
  • Specifications: No date.
  • Power reserve: 42 hours.
  • Introduced: 1970.
  •  Watches with this caliber: Oyster-Perpetual and Datejust.

Rolex Caliber 2035

  • Jewels: 28.
  • Specifications: Self-wind. Sweep-seconds. Progress-calendar. Shock protecting.
  • Power reserve: 42 hours.
  • Introduced: 1970.
  •  Watches with this caliber: Rolex Date.

Rolex Caliber 2130

  • Jewels: 29.
  • Specifications: No date.
  • Power reserve: 42 hours.
  • Introduced: 1983.
  •  Watches with this caliber: Rolex Oyster-Perpetual.

Rolex Caliber 2135

  • Jewels: 29.
  • Specifications: Date.
  • Power reserve: 42 hours.
  • Introduced: 1983.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Datejust.

Rolex Caliber 2230

  • Jewels: 31.
  • Specifications: No date.
  • Power reserve: 42 hours.
  • Introduced: 1999.
  •  Watches with this caliber: Oyster-Perpetual.

Rolex Caliber 2235

  • Jewels: 31.
  • Specifications: Date.
  • Power reserve: 42 hours.
  • Introduced: 1999.

Rolex Caliber 3000

  • Jewels: 27.
  • Specifications: No date.
  • Power reserve: 42 hours.
  • Introduced: 1990.
  • Watches with this caliber: Air-King.

Rolex Caliber 3035

  • Jewels: 27 jewels.
  • Specifications: Date. Microstella adjustment. Breguet balance spring.
  • Power reserve: 42 hours.
  • Introduced: 1997.
  •  Watches with this caliber: Rolex Datejust.

Rolex Caliber 3055

  • Jewels: 27.
  • Specifications: Day/date.
  • Power reserve: 42 hours.
  • Introduced: 1977.
  •  Watches with this caliber: Rolex Day-Date.

Rolex Caliber 3075

  • Jewels: 27.
  • Specifications: Fixed GMT hand.
  • Power reserve: 42 hours.
  • Introduced: 1981.
  •  Watches with this caliber: Rolex GMT-Master II and Explorer II.

Rolex Caliber 3085

  • Jewels: 27.
  • Specifications: GMT hand.
  • Power reserve: 42 hours.
  • Introduced: 1977.
  •  Watches with this caliber: Rolex GMT-Master II.

Rolex Caliber 3130

  • Jewels: 31.
  • Specifications: No date,Breguet overcoil. Microstella regulating system. Free-sprung balance.
  • Power reserve: 42 hours.
  • Introduced: 2001.
  • Watches with this caliber: Oyster-Perpetual.

Rolex Caliber 3131

  • Jewels: 31.
  • Specifications: No date. Parachrom blue hairspring. Antimagnetic.
  • Power reserve: 50 hours.
  • Introduced: 2007.
  •  Watches with this caliber: Rolex Milgauss, Air-King 40.

Rolex Caliber 3132

  • Jewels: 31.
  • Specifications: Automatic mechanical movement, Perpetual duo-directional rotor. No date. Parachro, Breguet overcoil balance spring. Paraflex shocks. Microstella regulating system
  • Power reserve: 48 hours.
  • Introduced:
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Oyster-Perpetual- Rolex Explorer 214270.

Rolex Caliber 3135

  • Jewels: 31.
  • Specifications: Date. Microstella regulating system. Breguet overcoil balance spring. Shock absorption. Certified Chronometer.
  • Power reserve: 50 hours.
  • Introduced: 1988.
  •  Watches with this caliber: Date, Datejust, Submariner.

Rolex Caliber 3155

  • Jewels: 31 jewels.
  • Specifications: Day/date. Certified Chronometer.
  • Power reserve: 48 hours.
  • Introduced: 1988.
  •  Watches with this caliber: Oyster Perpetual Date, Datejust, Submariner, Sea-Dweller, Yacht-Master,  Sea-Dweller Deepsea.

Rolex Caliber 3156

  • Jewels: 31.
  • Specifications: Day/date. Parachrom blue hairspring. Certified Chronometer. Paraflex shock absorber.
  • Power reserve: 48 hours.
  • Introduced: 2008.
  •  Watches with this caliber: Rolex Day-Date II.

Rolex Caliber 3175

  • Jewels: 31.
  • Specifications: GMT hand.
  • Power reserve: 48 hours.
  • Introduced: 1988.
  •  Watches with this caliber: Rolex GMT-Master 16700.

Rolex Caliber 3185

  • Jewels: 31.
  • Specifications: GMT hand. COSC certified. Breguet overcoil hairspring.
  • Power reserve: 50 hours.
  • Introduced: 1988.

Rolex Caliber 3186

  • Jewels: 31.
  • Specifications: GMT function. Multidirectional perpetual rotor. Date display. Chronometer certified. Parachrom blue hairspring. Free.spring balance.
  • Power reserve: 48 hours.
  • Introduced: 2005.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: GMT-Master II.

Rolex Caliber 3187

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. GMT function. Duo-directional perpetual rotor. Paramagnetic Parachrom blue hairspring. Paraflex shock absorbers. Instantaneous date
  • Power reserve: 48 hours.
  • Introduced: 2011.
  •  Watches with this caliber: Rolex Explorer II 216570.

Rolex Caliber 4030

  • Jewels: 31.
  • Specifications: Chronograph. Vertical clutch. Column wheel.
  • Power reserve: 42 hours.
  • Introduced: 1989.
  • Frequency: 28.8000.
  •  Watches with this caliber: Rolex Daytona 1991.

Rolex Caliber 4130

  • Jewels: 44.
  • Specifications: Mechanical chronograph. Perpetual duo.directional rotor. Paramagnetic Parachrom blue hairspring. Column wheel. Vertical clutch.
  • Power reserve: 72 hours.
  • Introduced: 2000.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Daytona.

Rolex Caliber 5035

  • Jewels: 11.
  • Specifications: Thermal compensated Quartz.
  • Power reserve: Quartz.
  • Introduced: 1977.
  • Frequency: 32,768 Hz.
  •  Watches with this caliber: Rolex Oysterquartz Datejust.

Rolex Caliber 5055

  • Jewels: 11.
  • Specifications: Day/date. Thermal Compensated Quartz module.
  • Power reserve: Quartz.
  • Introduced: 1977.
  • Frequency: 32,768Hz
  •  Watches with this caliber: Oysterquartz Day-Date.

Rolex Caliber 5335

  • Jewels: 23.
  • Power reserve: Quartz.
  • Introduced: Never introduced. The movement didn’t go into production because of unknown reasons. It is speculated that the movement was completed around 2000.
  •  Watches with this caliber: None.

Rolex Caliber 5355

  • Jewels: 23.
  • Specifications: Day/date. Perpetual calendar.
  • Power reserve: Quartz.
  • Introduced: Movement did not go into production. It is speculated that the movement was completed around 2000.

Rolex Caliber 9001

  • Jewels: 40.
  • Specifications: Automatic mechanical movement. Annual calendar. Ring Command Setting system. Duo-directional perpetual rotor. Paramagnetic blue Parachrom hairspring. Paraflex shock absorbers. Send time zone. Annual calendar. Month display.
  • Power reserve: 72 hours.
  • Introduced: 2012.
  • Frequency: 28800 BPH.
  •  Watches with this caliber: Rolex SkyDweller.

Rolex Caliber 3195

  • Jewels: 31.
  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. Paramagnetic blue Parachrom hairpspring. Moonphase. Date display.
  • Power reserve: 48 hours.
  • Introduced: 1988.
  •  Watches with this caliber: Rolex Cellini.

Rolex Caliber 1556

  • Specifications: Automatic mechanical movement. Duo-directional perpetual rotor. Day/date.
  • Frequency: 28.800 BPH.
  •  Watches with this caliber: Rolex Cellini.

Rolex Caliber 1555

  • Jewels: 26.
  • Specifications: Sweep seconds. Automatic. Breguet hairspring with regulating screws. Day/date.
  • Power reserve: 42 hours.
  • Introduced: 1959.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Day-Date.

Rolex Caliber 1535

  • Specifications: Date
  • Introduced: 1957.
  • Frequency: 18.000
  • Watches with this caliber: Rolex Air-King-Date, Explorer Date.

Rolex Caliber 1530

  • Jewels: 25/26.
  • Introduced: 1957.
  • Frequency: 18.000
  •  Watches with this caliber: Rolex Air-King and Submariner.

Rolex Caliber 1520

  • Jewels: 25/26.
  • Introduced: 1965.
  • Frequency: 19.800.
  •  Watches with this caliber: Rolex Air-King-Date and Explorer Date.

Rolex Caliber 1165

  • Jewels: 26.
  • Specifications: Date. Self-wind. Sweep-seconds. Progress-calendar. Shock protecting.
  • Introduced: 1965.
  • Frequency: 19.8000 BPH.
  •  Watches with this caliber: Oyster Perpetual Date.

Rolex Caliber 1160

  • Jewels: 26.
  • Specifications: Self-wind. Sweep-seconds. Shock protecting.
  • Introduced: 1964.
  • Frequency: 19.800 BPH.
  •  Watches with this caliber: Oyster Perpetual.

Rolex Caliber 1135

  • Jewels: 26.
  • Specifications:  Date. Self-wind. Sweep-second.Progress-calendar.
  • Introduced: 1955.
  • Frequency: 19.8000 BPH.
  •  Watches with this caliber: Oyster Perpetual Date.

Rolex Caliber 1130

  • Jewels: 26.
  • Specifications: Self-winding. Sweep-seconds. Shock protecting.
  • Introduced: 1955.
  • Frequency: 19.800 BPH.
  •  Watches with this caliber: Oyster Perpetual.

Rolex Caliber 1120

  • Jewels: 17/27.
  • Specifications: Self-wind. Small seconds. Shock protecting.
  • Introduced: 1953.
  • Frequency: 19.800 BPH.
  •  Watches with this caliber: Oyster Perpetual.

Rolex Caliber 1080

  • Jewels: 25.
  • Specifications: Antimagnetic. Movement for Milgauss. Self-wind. Sweep-seconds. Shock protecting.
  • Introduced: 1955.
  • Frequency: 18.800 BPH.
  •  Watches with this caliber: Milgauss.

Rolex Caliber 1065

  • Jewels: 25.
  • Specifications: Date. Self-wind. Sweep-seconds. Instant-calendar. Shock protecting.
  • Introduced: 1955.
  • Frequency: 18.000 BPH.
  • Watches with this caliber: Oyster Perpetual Date.

Rolex Caliber 1055

  • Jewels: 25.
  • Specifications: Day/date. Self wind, Sweep-seconds. Shock protecting.
  • Introduced: 1954.
  • Frequency: 18.000
  • Watches with this caliber: Day-Date.

Rolex Caliber 1040

  • Jewels: 25.
  • Specifications: Tru-beat. Self-wind. jumping sweep-seconds. Shock protecting.
  • Introduced: 1954.
  • Frequency: 18.8000 BPH.
  • Watches with this caliber: Tru-Beat.

Rolex Caliber 1036

  • Jewels: 25.
  • Specifications: Date. GMT. First movement able to show two time zones simultaneously. Self-wind. Sweep-seconds. Instant-calendar.
  • Introduced: 1954.
  • Frequency: 18.800 BPH.
  • Watches with this caliber: Rolex GMT-Master and Oyster Perpetual Date.

Rolex Caliber 1035

  • Jewels: 25.
  • Specifications: Self-winding. Sweep-seconds. Shock protecting. Progressive calendar.
  • Introduced: 1957.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Oyster Perpetual Date.

Rolex Caliber 1030

  • Jewels: 17/25.
  • Specifications: The first in-house complete calibre design of Rolex. Certified Chronometer.
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Oyster Perpetual,  Submariner, and Explorer.

Rolex Caliber 1060

  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Deep Sea Special.

Rolex Caliber 780

  • Jewels: 18.
  • Specifications: Day/date. Moon phase. Chronograph. Self-wind. Calendar-
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex 6062.

Rolex Caliber 775

  • Jewels: 18.
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Explorer/pre-explorer.

Rolex Caliber 765

  • Jewels: 18.
  • Specifications: Self-wind. Sweep-seconds. Calendar.
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Date.

Rolex Caliber 745

  • Jewels: N/A.
  • Specifications: Self-wind. Sweep-seconds. Calendar.
  • Introduced: 1952.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Date.

Rolex Caliber 740

  • Jewels: 18.
  • Specifications: Used in the Rolex Datejust. The first automatic date function in a wristwatch.
  • Introduced: 1945.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Datejust.

Rolex Caliber 730

  • Jewels: 18.
  • Specifications: Self-wind. Chronometer. Sweep-seconds. Shock protecting.
  • Introduced: 1945.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Bubble back.

Rolex Caliber 720

  • Jewels: 18.
  • Specifications: Self-wind. Chronometer. Small seconds. Shock protecting.
  • Introduced: 1940.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Oyster Perpetual.

Rolex Caliber 645

  • Jewels: 18.
  • Specifications: Self-wind. Sweep-seconds. Shock protecting.
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  • Watches with this caliber: Oyster Perpetual.

Rolex Caliber 635

  • Jewels: 17.
  • Specifications: Self-winding. Small seconds. Shock protecting.
  • Introduced: 1950.
  • Frequency: 18.000 BPH.
  • Power reserve: 41 hours.

Rolex Caliber 630

  • Jewels: 18.
  • Specifications: Self-wind. Sweep-seconds.
  • Introduced: 1937.
  • Frequency: 18.000 BPH.
  •  Watches with this caliber: Rolex Bubble Back.

Rolex Caliber 620

  • Jewels: 18.
  • Specifications: The first movement featuring an automatic rotor winding mechanism upon its release. This movement came to introduce the “Perpetual” name which is used still to this day.
  • Introduced: 1931.
  • Frequency: 18.000 BPH.
  • Watches with this caliber: Rolex Bubble Back.

Rolex Caliber 530

  • Frequency: 18.000 BPH.
  • Jewels: 17.
  • Specifications: Self-wind. Sweep-second.
  • Introduced: 1936.
  • Watches with this caliber: Rolex Bubble Back.

Rolex Caliber 520

  • Jewels: 18.
  • Specifications: Self-wind. Small seconds.
  • Introduced: 1936.
  • Frequency: 18.000 BPH.

Rolex Caliber 420

  • Jewels: 18.
  • Specifications: Self-wind. Small seconds.
  • Introduced: 1941.
  • Frequency: 18.000 BPH.

Rolex Caliber 1066

  • Jewels: 25.
  • Specifications: Self-wind. Sweep-seconds. Shock protecting. Instant-calendar. GMT hand. Used in the first version of the GMT-Master.