CALIBRE 1166

Introduction and Launch: The Rolex calibre 1166 is an automatic movement introduced in 1967 and used in Oyster Perpetual Date models throughout the 1960s and 1970s. As the Lady-Datejust and midsize Datejust models shared similar case sizes, they also utilised the same self-winding movements. The lineage began with calibre 1135 in 1957, which was later succeeded by calibre 1166, continuing Rolex’s commitment to precision and reliability.

Technical Specifications

Jewels:
26 Jewels
Power Reserve:
Power reserve of approx 48 hours
Beat Rate:
Operating at 19,800 vibrations per hour (2.75Hz)
Movement:
Self-Winding mechanical movement
Escapement:
Calibre 1166 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 Anti-Shock System
Hairspring:
Breguet Hairspring
Certification:
Calibre 1166 is certified by the Official Swiss Chronometer Testing Institute (COSC) for precision and accuracy

Design and Features

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

Watches with this Calibre

Rolex Oyster Perpetual Date:
6516 / 6517 / 6519 / 6520 / 6521 / 6524 / 6527 / 6529 / 6531 / 6533 / 6624 / 6625 / 6627 / 6629 / 6660 / 6631 / 6632 / 6633 / 6635 / 6639 / 6701 / 6702 / 6703 / 6704/ 6705
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