Introduction and Launch: The Rolex calibre 745, introduced in 1952, was an automatic movement used in Datejust models from 1952. Many of Rolex’s earliest watches, including those with this calibre, were not chronometer-certified. While the “Superlative Chronometer Officially Certified” text on modern Rolex dials signifies precision and prestige, some collectors appreciate the cleaner aesthetic of non-COSC dials with less text.
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 745 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
Hairspring:
Breguet Hairspring
Certification:
The calibre 745 is a certified Swiss chronometer, a title awarded to high-precision watches that have met the rigorous standards of the Swiss Official Chronometer Testing Institute (COSC)
Hands Configuration:
Hours, minutes, central seconds and date window at 3 o'clock
Watches with this Calibre
