Robert Greubel and Stephen Forsey (Robert Greubel) and Stephen Forsey (Stephen Forsey) for the pursuit of ultimate precision first proposed the basic tourbillon 30° watch was exhibited at Baselworld in 2004.
Seven years later, their Double Tourbillon 30° technology won the first prize in the International Timekeeping Championships, setting a record of 915 points (out of 1000 points), and the average daily timekeeping speed was between 0.3 and 0.8 seconds throughout the competition. .
The latest interpretation of this exclusive creation is a limited edition of 11 timepieces, all housed in a blue ceramic case. Only provide it to the US market.
Graubel’s Forsey Double Tourbillon 30° ceramic watchmaking process benefits from a unique solution that provides excellent precision: four minutes of rotation in the cage, the smaller cage equipped with a balance wheel and spring assembly is compared to the first The cage is inclined at an angle of 30° and completes one rotation within 60 seconds. Combining the 30° inclination with the different speeds of the two tourbillons can average out the position errors caused by gravity in all common watch positions (especially stable positions), thereby improving the timing performance.
Four coaxial barrels are connected to a spherical power reserve differential, which can provide 120 hours of chronograph power reserve. The movement beats at a frequency of 3 Hz (21,600 vibrations per hour).
Thanks to the use of sapphire crystal glass, hour and minute hands and a 4-minute tourbillon rotation indicator at 6 o’clock on the watch bridge, the overall structure of the movement and the entire side can be appreciated.
The gold small seconds and power reserve indicator are made of blue, which contrasts sharply with the frosted main board, reminiscent of the blue ceramic of the replica watches for sale case. The hands are hollowed out to further enhance light and transparency.
Processed from a single piece of sapphire, the sides of the bridge are polished with different textures, requiring highly professional tools, excellent precision and expertise. The beveled corners reveal the matte finish, which contrasts sharply with the sapphire polished transparent surface.
On the side of the bottom cover, the three-dimensional gear chain bridge can clearly see the building below. This unusually large bridge has a multi-layered design with with holes that allow the wheels to overlap the sapphire accurately.
The case has a diameter of 48.40 mm and a height of 17.77 mm. It is made of dark blue ceramic. This is Greubel Forsey’s first product. The material is compacted by pressing and molded before firing. During the heat treatment, it shrinks by about 25%. Once the components are sintered at a very high temperature, the ceramic solidifies, making the case very hard and extremely resistant to scratches and corrosion, but also more difficult to handle. Copy watches