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Rolex 500
Last updated: July 26, 2025
Brand
Caliber Number
500
Production Period
1931 – 1935
Lignes
10.5”’
Diameter
23.3 mm
Height
5.6 mm
Power Reserve
Unconfirmed
Frequency
18,000 A/h (2.5 Hz)
Jewels
15 or 17
Escapement
Swiss Lever
Anti-Shock Device
None
Hand Count
2 or 3
Manufacture Region
Unconfirmed
Functions
Automatic (Perpetual)
Rolex 500 Description
The Rolex Caliber 500 is the specific, foundational automatic movement that launched the legendary “Oyster Perpetual” line in the early 1930s. Based on an Aegler Hunter 10.5”’ manual-wind caliber, Rolex attached its revolutionary, single-direction 360° “Perpetual” rotor. The added thickness of this winding mechanism necessitated the famous domed “Bubbleback” case, making this time-only movement the true origin of Rolex’s automatic watch legacy.
