| 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
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Recent Comments
I wish they still made movements with this color.
Nice looking movement, I will have to check these out.
Exclusive my arse!
Very interesting article- thanks! Timex offers the NH35A (Malaysia, TMI) in its Harborside Coast Automatic.…
6309 was discontinued in 1988. The youngest ones are 36 to 37 years old now…
Is this movement, gold plated or brass? Thanks
Hello, you can also find it in the BRISTON Streamliner Skeleton