The revolutionary new watch from Girard-Perregaux, revealed on March 26th, 2013 in Zurich. According to G-P:
"A true technical revolution that stunned connoisseurs when some prototypes of the innovative mechanism were first presented, the Constant Escapement is now integrated into the movements driving the new models of Girard-Perregaux’s Haute Horlogerie collection. It has taken five years of research and development in virtually unexplored territory to consolidate and ensure the reliability of this significant step in watchmaking history.
The name, in addition to being a nod to one of the Maison’s historical figures, Constant Girard-Perregaux, also refers to a holy grail in mechanical watchmaking that has perplexed watchmakers since the dawn of time: the constant force. Keeping true to its innovative vision, the brand decided to try using a quite novel approach to achieve it.
In housing this unique movement with its totally original and innovative escapement, the case had to do justice to the feat of engineering, to showcase it without hiding behind it.
Launching the Haute Horlogerie Constant Escapement collection, the first model to be equipped with the device stands out with its resolutely technical and contemporary design, with a nod Girard-Perregaux’s codes and its creative tradition. The movement takes its place in a comfortable round 48 mm diameter case in white gold with a curved case band.
To offer maximum visibility to the escapement itself, with its butterfly wing frame and the vibrating blade in its central axis, the hours and minutes occupy a sub-dial off-centered at 12 o’clock. This is flanked by the two energy reservoirs in the shape of the double barrels. Logically linear, the power reserve indicator is placed at 9 o’clock.
The whole of the lower part of the watch is reserved for the Constant Escapement, which occupies center stage and steals the show, beating at the frequency of 3 Hz or 21,600 vibrations per hour. Under the anti-glare treated sapphire glass the brand’s three emblematic bridges are visible and play their structural role in a novel layout.
This manually wound caliber is no thicker than 8 mm, while the case that houses it measures 14.63 mm, with a wide open sapphire glass back held in place by 6 screws offering another angle of view on the remarkable 3-D construction of this unique movement.
With its hand-sewn alligator strap and folding clasp, the model will be offered in Girard-Perregaux’s Haute Horlogerie collection."
More information here: http://www.girard-perregaux.com/news/news-details-en.aspx?type=News&id=513