Rolex 300
Last updated: August 3, 2025

Brand
Caliber Number
300
Production Period
1960-1969
Lignes
5.25”’
Diameter
13.75 mm
Height
2.95 mm
Power Reserve
Unconfirmed
Frequency
21,600 bph (3 Hz)
Jewels
17
Escapement
Swiss lever
Anti-Shock Device
Incabloc
Hand Count
2/3
Manufacture Region
Unconfirmed
Functions
Hours, Minutes, (optional Seconds)
Rolex 300 Description
A simple and reliable manual-wind movement from the mid-20th century, typically found in Rolex’s elegant “Precision” and ladies’ dress watch lines. Prioritizing a slim profile, this caliber operated at a steady 21,600 bph and was not part of the Oyster Perpetual family. It represents Rolex’s tradition of crafting quality, time-only movements where simplicity and elegance were key.
Watches Using The Rolex 300 Caliber
No posts found