CALIBRE 1555

Introduction and Launch: The Rolex calibre 1555, introduced in 1955, was developed for various Rolex Oyster Perpetual Day-Date models. Marking a significant milestone in Rolex’s movement evolution, its introduction enhanced the functionality of the Day-Date series and reinforced the brand’s reputation for precision and craftsmanship. Though later succeeded by more advanced movements, the calibre 1555 remains a testament to Rolex’s innovation and dedication to excellence.

Technical Specifications

Jewels:
25 Jewels
Power Reserve:
Power reserve of approx 42 hours
Beat Rate:
Operating at 18,000 vibrations per hour (2.5Hz)
Movement:
Self-Winding mechanical movement
Escapement:
Calibre 1555 features a traditional Swiss lever escapement. It consists of a balance wheel, hairspring, pallet fork, and escape wheel. This mechanism not only regulates the energy release from the mainspring but also maintains the balance assembly at a consistent and precise rate
Anti-Shock:
Kif A Anti-Shock System
Hairspring:
Breguet Hairspring
Certification:
Calibre 1555 is certified by the Official Swiss Chronometer Testing Institute (COSC) for precision and accuracy

Design and Features

Hands Configuration:
Hours, minutes, seconds, day window at 12 o'clock and date window at 3 o'clock

Watches with this Calibre

Rolex Oyster Perpetual
Day-Date:
1802 / 1803 / 1804 / 1805 / 1806 / 1807 / 1808 / 1809 / 1810 / 1811 / 1812
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