4130

About the Rolex 4130

The vertical clutch starts the chronograph seconds hand without a jump and lets it run continuously without wearing the train; the column wheel gives the pushers a clean action; and a construction of around 290 components, against more than 400 in a conventional chronograph, is what Rolex meant by reliability. It is 30.5 mm across and 6.5 mm high with 44 jewels, a 72-hour reserve and a beat of 28,800 vph, and from the mid-2000s it carried the blue Parachrom hairspring. Every one is a COSC chronometer, and from 2015 a Superlative Chronometer. The chronograph piece explains why that combination became the modern standard.

In the library it powers the 116500 generation of the Daytona: 133 references, most of them in gold, Everose and platinum, with the Cerachrom-bezel versions from 2011.

The 4030 is the Zenith El Primero-based movement of 1988 it replaced, and the 4131 the 2023 update with the Chronergy escapement.