News SIHH 2012

Tourbillon 24 Secondes Contemporain

The magical royal blue finish with the flamboyance of the tourbillon

The Watch Quote™ - January 29th, 2012



Greubel Forsey launches the Tourbillon 24 Secondes Contemporain, which is characterised by its round case and the emphasis on the technical aspects of the movement, particularly the tourbillon.

With the Tourbillon 24 Secondes Contemporain, Robert Greubel and Stephen Forsey have once again challenged the frontiers of horological architecture in three-dimensions.

The depth of vision is enhanced for the first time at Greubel Forsey by the royal blue finish of the plates and bridges. 
The Tourbillon 24 Secondes Contemporain is a unique edition of 33 pieces featuring a titanium movement and platinum case.




An Expression of Architecture


The aim from the very start of its development was to offer a three dimensional view within a circular backdrop highlighting the beauty of Greubel Forsey’s Tourbillon 24 Secondes mechanism.

Robert Greubel and Stephen Forsey were guided in their architectural and technological creativity by a desire to achieve aesthetic balance in every dimension. The distinctive 12 o’clock index in relief is an example of the innovative spatial management of the components within this architectural study.

A transparent synthetic sapphire tourbillon bridge gives a captivating and hypnotic impression of the regulator floating in mid-air and underlines one of the highly creative challenges which are to be found throughout the timepiece.

And what makes it individual to every eye yet brings it a perfect harmony is the marriage of simplicity and complexity.




Royal Blue


The Tourbillon 24 Secondes Contemporain is distinguished by the magical royal blue finish of the titanium movement juxtaposed with the flamboyance of the tourbillon.
This unique colour recalls to mind the ocean’s abyss and strengthens the depth of architecture of the movement.

The purity of this intense blue finish, achieved through a special oxidation process is the fruit of considerable research and testing and, shimmering in an infinite range of hues according to the light, gives the timepiece an unparalleled vivacity.

The Tourbillon 24 Secondes

This timepiece houses Greubel Forsey’s third fundamental invention, the Tourbillon 24 Secondes: a highly-efficient fast-rotating – 24-second revolution – tourbillon cage inclined at 25 ° which minimises negative effects of gravity on the oscillator, particularly in stable positions.

Technical details


The movement comprises 267 components, 88 for the tourbillon cage which weighs 0.39 grams and is powered by two coaxial mainspring barrels in series that provide a power reserve of 72 hours. The oscillator features a variable inertia balance with Phillips terminal curve beating at 3Hz / 21,600 APH.

The titanium plate and bridges feature a royal blue anodized oxide treatment and are hand finished with straight graining and spotting. Bridges in nickel silver with nickel-palladium finish are frosted and straight-grained with hand polished bevels. The tourbillon bridge is transparent synthetic sapphire while the tourbillon cage is in titanium. The hour and minute dial is in synthetic sapphire while small seconds dial and power reserve indicator are in gold. The platinum case measures 43.5 mm in diameter by 15.2 mm high and features domed synthetic sapphire crystals on the dial side and display back. The blue alligator strap is hand-stitched with a platinum 950 folding clasp.


Greubel Forsey Tourbillon 24 Secondes Contemporain
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Greubel Forsey Tourbillon 24 Secondes Contemporain

Technical description


Movement:with patented tourbillon
Movement dimensions
Diameter:36.40 mm
Thickness:10.90 mm
Number of parts
Complete movement:267 parts
Tourbillon cage:88 parts
Weight of the cage:0.39 g
Number of jewels:40
Olived-domed jewels in gold chatons
Power reserve:72 hours
Barrels:Two coaxial series-coupled fast rotating barrels (1 turn in 3.2 hours), one of which is equipped with a slipping spring to avoid excess tension
Balance wheel:Free sprung variable-inertia balance with gold mean-time screws (10 mm diameter)
Frequency:21’600 vibrations/hour
Balance spring:Phillips terminal curve
Geneva-style stud
Main Plates:Titanium, spotted, with polished bevelling, frosted, royal blue treatment
Bridges:Nickel silver, frosted and spotted, nickel-palladium treatment with polished bevelling
1 gold plate engraved with the individual number
1 titanium plate engraved with the individual number
Synthetic sapphire crystal tourbillon bridge Gearing
Involute circle profile
Tangential inclined gear with profiled teeth, on fixed wheel and escape wheel pinion
Tourbillon cage:Inclined at a 25° angle, 24-second rotation
Cage pillars in Avional
Titanium cage bridges
Gold counterweight
Displays:Hour and minute
Small second
72-hour power reserve on a sector
24-second tourbillon rotation indicator
Exterior
Case:Platinum 950 with convex synthetic sapphire crystal
Transparent back:with synthetic sapphire crystal
Engraving:Raised polished “Tourbillon 24 Secondes Incliné” on a hand-punched background
Lugs:Three-dimensional, variable geometry-shaped lugs
Security screws:Gold
2 platinum plates:engraved, hand-finished with texts, screwed to the caseband
Unique edition:of 33 pieces
Case dimensions
Diameter:43.50 mm
Thickness:15.20 mm
Water resistance
of the case		:3 atm - 30 m - 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown:In platinum with engraved and black lacquered GF logo
Dial:Synthetic sapphire crystal hour-ringl
Small second dial and power-reserve sector in gold
Hands:Hour and minute in polished gold, with Super-LumiNova
Small seconds (red triangle)
Power-reserve in polished gold
24-second double-tipped hand, black anodised aluminium
Strap:Hand-sewn dark blue alligator
Clasp:Platinum 950 folding clasp, hand-engraved with the Greubel Forsey logo

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