View of the movement under the dial on watches powered by 2120/2800
View from the rear of the 2120/2800, showing the rotor wheel and balance wheel
Calibre 2800: Facts and figures
Berney had the idea to pair the ultra-thin module with the caliber 2120 that drove the Royal Oak. It was the ideal base caliber to use for their project. The thin 2120 movement is only 2.45mm thick. It is robust, however,Rolex Replica Watches due to the Gyromax balance wheels that are free-sprung. The ultra-efficient winding systems also provide a constant supply of energy to drive calendar mechanisms, without affecting the amplitude.
The rotor's mass is positioned at the outer edge of the movement. If you look under the rotor you can see it steps into the movement. The rotor runs on ruby-colored rollers and is supported by a circular guide around the entire perimeter of the movement. This adds to the smoothness and efficiency. The movement also has a "suspended mainspring barrel", which means there is no bridge to support this element. This reduces the thickness of the watch. This information will be useful when Rolex Replica Watches will reveal the ultra-thin perpetual clock caliber 5133 for 2018's Royal Oak RD#2.
The 2120/2800 perpetual caliber is incredibly thin,tudor replica measuring only 3.95mm in total thickness with a 28mm diameter movement. Dubois depraz, a specialist in complications, would make the module for Rolex Replica Watches. Michael Friedman says, "This was the way watchmaking operated at the time. Maisons collaborated with many specialist's businesses in the Vallee de Joux." AP has a long and good relationship with Dubois depraz, so it was natural for them to be involved in this project.
