In 2000, Rolex introduced the Caliber 4130, the chronograph movement completely developed and manufactured by Rolex for the Cosmograph Daytona. Now finally perfect Manufacture Chronograph, Rolex has recently presented new models of the Daytona.
The Caliber 4130 replaced the Caliber 4030, which Rolex had put into operation at the end of the 1980s. It was this Caliber, based on the Zenith El Primero movement, that made the Cosmograph Daytona an automatic watch.
Equipped with column wheel and vertical clutch, the new movement is characterized by an instantaneous and extremely precise start of time measurement as well as great robustness. The Daytona’s chronograph function is activated by screw-down pushers and, of course, the watch has official COSC chronometer certification for maximum precision. Thanks to the Perpetual Rotor and various new developments like the Parachrom hairspring the Caliber 4130 offers great resistance to temperature variations and shocks and a power reserve of approximately 72 hours.
See how a Rolex 4130 calibre is completely disassembled during service in this downright meditative video:
Continuously updated article, originally put online in March 2017.