Oscillator
The oscillator – another major component of the calibre 7135 regulating system – also demonstrates excellent resistance to strong magnetic fields. A number of innovations have made this possible.
One of these is the balance staff, which is crafted from a high-technology ceramic, patented and exclusive to Rolex. It is a remarkably strong and resilient material used only for manufacturing the balance staff.
The balance wheel itself is made from optimized brass. This is the first time that Rolex has made use of such an alloy, which, like the ceramic, is resistant to strong magnetic fields.
Calibre 7135 incorporates a Syloxi hairspring with reshaped coils, which are now thicker to confer greater rigidity. This modification grants greater power to the patented silicon hairspring – an essential factor for the movement to beat at 5 hertz, a rate that notably allows the watch to maintain its chronometric precision whatever the wearer's actions and arm movements.
Two optimized high-performance Paraflex shock absorbers cushion the ceramic balance staff. Their special internal architecture allows the balance staff to turn smoothly and regularly in any position.