Tuesday, March 24, 2015

Girard-Perregaux Neo-Tourbillon with Three Bridges and DLC Titanium Case

A contemporary reinterpretation of movement architecture designed by Girard-Perregaux in the nineteenth century, the Neo-Tourbillon with Three Bridges and DLC titanium case definitively places the Manufacture in the third millennium and puts the watch mechanism on the level of kinetic art.

The Neo-Tourbillon is primarily the expression of a stylistic principle around which it is possible to compose without ever deviating from the blueprint. The new aesthetic used to magnify the ethereal mechanism plays with the graphic codes of the era to attract and maintain attention. It also uses the best that avant-garde technology and materials have to offer. The new bridge design, through its curves, emphasises the omnipotence of this dynamic as expressed in the geometric design of bridges in the watch presented in 1889 by Constant Girard-Perregaux at the Universal Exhibition in Paris, which went on to win a gold medal.
The structure of the bridges, openworked in such a way as to give an insight into each detail, is an ethereal celebration of the mechanism. Machined in titanium, a metal nearly half the weight of steel, each bridge is sand-blasted and then PVD-treated to give a materiality to this fine construction, which is a tribute to contemporary architecture and sometimes defies the rules of universal gravitation. Yet this is quite logical as the Tourbillon, supported by its sculptural arch, performs a timed revolution that has the fascinating property of releasing the balance spring from the effects of gravity.
To maximise the visual effect engineers and watchmakers have reworked the plate, also sand-blasted and black treated, in order to concentrate perspectives and light in its centre. This centre is contrasted and fractal, formed by a succession of three intertwining light grey circles.
The sophisticated plate is designed like a frame and protected by a super-convex crystal dispensing the need for the case to include a bezel and thus emphasising a very large and magnificent Tourbillon cage.
Also made in titanium, as in traditional steel versions, it offers fine watchmaking finishing with "traits tirés" surfaces and hand chamfered ridges. Performing a full rotation in one minute, this 14.44 mm diameter part, comprising 80 components and weighing only 0.25 grams, takes with it in its timed circle a balance spring adjusted by a set of gold screws, oscillating at 3 Hz through a spiral with a Phillips terminal curve.
The calibre of the Neo-Tourbillon with Three Bridges, the GP09400, is a highly complication movement which consists of 245 parts. Distributed into subsets, they facilitate servicing of this heart finished to fine watchmaking standards. It is also the result of a large-scale development involving exclusive technical solutions, for some selected options such as automatic winding.
The platinum rotor that rewinds the barrel spring in one direction is placed beneath it and not around its drum as applied by the Manufacturer on certain other Tourbillon with Three Bridges models. This reviewed positioning guarantees the watch a power reserve of 60 hours by the use of a larger diameter barrel drum, capable of holding a much longer spring. 
Aware of the stylistic choices made, watchmakers have removed the teeth on the drum and replaced them with a screwed wheel. Engraved and chamfered, this wheel has six arms, assembled like turbine blades, to form a unique décor whose pattern is repeated as a kind of signature on the other visible wheels in the movement.
The Neo-Tourbillon with Three Bridges has a 45 mm case in titanium DLC, water resistant to 30 metres and worn on an alligator strap. The transparent case-back allows enthusiasts to admire the micro mechanical components, some of which have been specifically designed to capture specific shapes of the Tourbillons with Three Bridges. An arrow-shaped bridge completely crosses the movement. Likewise, the ratchet at 12 o'clock reproduces the shape of a lyre and all the parts of the calibre, in addition to playing with multiples of three, have contemporary finishes treated according to the strictest traditional watchmaking rules.
Technical details
Model: Girard-Perregaux Neo-Tourbillon with Three Bridges
Reference: 99270-21-000-BA6A

Case
DLC Titanium Case
Diameter: 45.00 mm
Crystal: anti-reflective sapphire
Crown: titanium with engraved GP logo
Hands: dauphine style skeletonised, in gold
Case-back: sapphire crystal, secured by 6 screws
Water resistance: 30 meters (3 ATM)

Movement
Girard-Perregaux GP09400-0002 movement
Automatic mechanical movement
Diameter: 36,60 mm (16 ''')
Thickness: 8,21 mm
Frequency: 21.600 Vib/h - (3 Hz)
Power reserve: min. 60 hours
Jewels: 27
Number of components: 245
Main plate: PVD treatment and a sand-blasting finish
Bridges: Three Bridges in titanium with PVD treatment, beveled and sand-blasted
Barrel: upper wheel of the barrel skeletonised beveled, polished, circular grained and engraved.
Tourbillon:
- Cage of the Tourbillon: 80 components for a total 0.25 grams in weight
- One revolution per minute
- Bevelled and hand-polished upper and lower cages
Balance wheel: variable inertia with golden poising screws
Spiral: Philips terminal curve
Winding: micro-motor in platinum, assembled on the same shaft as the barrel

Functions
Tourbillion, hour, minute, small second on the Tourbillon

Strap
Hand stitched black alligator leather strap
Folding buckle with PVD Titanium blades and ceramic cover

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