ROLEX CALIBRE 4130
Even in the relatively dignified realm of luxury watch collecting (high expense and a Britannica’s worth of technical history and cult lore promotes sobriety), there are fanboys, and the objects of their fevered affection falls upon Rolexes, not a few. Lusted after at a higher pitch even in this company, is the Daytona Cosmograph, and this was recently demonstrated once again at Baselworld 2016 when the announcement of a new steel cased Daytona with white dial and black ceramic bezel sent the watch press and enthusiast community into another fit of ecstasy.
Why is this? Some credit surely accrues to the movement behind the silvered/ lacquered face: the Calibre 4130.
The Daytona wasn’t always mated to the 4130. Introduced in 1963, it was driven by a hand-wound Valjoux movement till 1988
Automatic chronograph movement beating at 4Hz, with 72-hour power reserve Dimensions: 30.5mm x 6.5mm Number of parts: 201
when it was cased with Zenith’s self-winding El Primero movement (also featured on our list). However, Rolex famously detuned the movement from its native 5Hz to a more conventional 4Hz, while swapping out more than 50 per cent of the El Primero’s original parts. Major surgery; but still, not a Rolex movement. That would come in 2000, in the shape of the 4130, ticking all the right boxes: selfwinding, column wheel control, vertical clutch for smooth starts, and Parachrom hairspring designed to perform well against magnetism, temperature variation, and shock. Rolex even reduced the number of parts enough that it could fit in a longer mainspring to achieve an impressive 72 hours of power reserve. It is a chronometer too, naturally.