Calibre 7135, a high-frequency movement
The Land‑Dweller is powered by calibre 7135, a movement entirely developed and manufactured by Rolex and released this year. An evolution of calibre 7140, which has equipped the 1908 model since its launch in 2023, the new self-winding mechanical movement delivers outstanding performance, particularly in terms of precision, power reserve, convenience and reliability.
Driven by a self-winding system via a Perpetual rotor, calibre 7135 is particularly noteworthy for its revolutionary regulating mechanism – escapement and oscillator – that enables it to beat at a frequency of 5 hertz, or 36,000 beats per hour, thereby measuring time to one tenth of a second. Thanks to its barrel architecture and the escapement’s excellent efficiency, the power reserve of this movement extends to approximately 66 hours. Fine attention to detail has been paid to the aesthetics of calibre 7135. Its bridges are decorated with Rolex Côtes de Genève, while the cut-out oscillating weight is fashioned in yellow gold.
Dynapulse escapement
For the highly energy-efficient Dynapulse escapement – the first component of the regulating system – seven patent applications were filed. The new escapement significantly enhances the way in which the energy delivered by the barrel is transmitted to the oscillator.
The Dynapulse is a sequential distribution escapement made from silicon, a material resistant to strong magnetic fields. It is composed of a transmission wheel that engages with two distribution wheels; these, in turn, activate the impulse rocker, which then connects with the oscillator. This innovative architecture reduces the escapement’s energy consumption since the various components interact by rolling against each other, rather than by sliding as in the case of the Swiss lever escapements used in the brand’s other mechanical movements.
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.