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Rolex 620
Last updated: July 26, 2025
Brand
Caliber Number
620
Production Period
1945 – 1955
Lignes
10.5”’
Diameter
23.7 mm
Height
6.35 mm
Power Reserve
Unconfirmed
Frequency
18,000 A/h (2.5 Hz)
Jewels
17, 18, or 19
Escapement
Swiss Lever
Anti-Shock Device
Kif Flector
Hand Count
3
Manufacture Region
Unconfirmed
Functions
Automatic (Perpetual)
Rolex 620 Description
The Rolex Caliber 620 was a workhorse automatic movement of the “Big Bubbleback” era from the mid-1940s to early 1950s. As a key member of the 10.5”’ 600-series, it was a more robust, integrated, and accurate design than earlier calibers. It was produced in both non-chronometer and “Officially Certified Chronometer” grades and was fundamental in establishing Rolex’s reputation for precision in its Oyster Perpetual line.
Watches Using The Rolex 620 Caliber
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