Rolex Caliber 6620 Quartz Specs

Rolex Caliber 6620

Brand Rolex
Caliber Number 6620
Movement Type Quartz
Jewels 8
Crystal Oscillator Frequency
32,768 Hz (cycles per second)
Duration of Impulse 7.80 ms
Overall Diameter 19.80mm
Battery (Cell) Number SR 721 SW (1.55V)
Functions Hours, minutes
Country of Manufacture Switzerland
Known Models 6623

Despite popular belief, Rolex also produces quartz movements, notably the caliber 6620 found in some Cellini models (ie: Rolex 6623). Some other characteristics are:

  • Stop motor device
  • Rotative stepping motor: 1 step every 10 seconds
  • Acceleration device for checking the train: 32 steps/sec

Rolex Caliber 6620 Quartz Specs

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Steve Tang
Steve Tang
10 years ago

Learn something every day. Didn’t know Rolex had a quartz watch.

7 years ago

Can anyone get me a part for this watch or quote me new movement please?

6 years ago

Is this caliber thermocompensated?

Hisham M Al Zairy
Hisham M Al Zairy
3 years ago

Great looking watch and movement

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