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Foudroyante, which is French for bolt of lightning), chronographs have all the time been very uncommon as a result of in measuring fractions of a second by driving a hand that rotates each second makes use of loads of vitality.
And that’s a double whammy for the motion because the vitality driving the fast-rotating foudroyante hand comes immediately from the escapement the place the slightest drop in torque could make an enormous distinction to accuracy.
Greubel Forsey Nano Foudroyante on the wrist
With the Nano Foudroyante: Greubel Forsey has solved the inherent drawbacks in foudroyante chronographs through the use of nanotechnology to cut back energy consumption by an unimaginable 1,800 instances.
And it’s price noting that whereas the foudroyante rotates on high of the flying tourbillon, it’s dial is cleverly designed to repeatedly have 12 o’clock on the high.
Mixed that with a flying tourbillon and a really wearable 38 mm case – Greubel Forsey’s smallest case so far. I really like the design, the complication, and the dimensions. If I had a spare $600k this could be the Greubel Forsey for me.
From the press launch
Greubel Forsey unveils the primary official restricted version of its Nano Foudroyante: a breakthrough timepiece born from years of analysis, now matured past its Experimental Watch Technology (EWT) origins. Restricted to only 22 timepieces, this creation marks a major new chapter in Greubel Forsey’s tenth Basic Invention.
Again of the Greubel Forsey Nano Foudroyante
From prototype to timepiece
Initially offered in 2024 as a commemorative EWT version, the Nano Foudroyante was Greubel Forsey’s most technically radical idea so far. At the moment, it has advanced into a totally realized and unbiased creation – not tethered to an anniversary or prototype designation.
The brand new Nano Foudroyante is crafted fully in white gold, changing the unique mixture of white gold and tantalum. It presents a special architectural id: the gold dial is now completed in rhodium with a blue minute monitor, whereas the arms are rendered in blued metal with matching cannon pinions.
Greubel Forsey Nano Foudroyante
The foudroyante dial itself is now white with transferred numerals, enhancing legibility and echoing the crisp visible language of the tourbillon aperture. A blue textured rubber strap completes the aesthetic – a transparent evolution from the unique version, and a declaration of this timepiece’s personal distinct persona.
Nanomechanics: reinventing the potential
On the coronary heart of this timepiece lies a disruptive concept: nanomechanics – the management of vitality on the nanojoule scale inside a mechanical transferment. This paradigm shift permits the Nano Foudroyante to function its eponymous complication utilizing simply 16 nanojoules per bounce, in comparison with 30 microjoules in conventional designs – a staggering discount by an element of 1,800.
The complication divides every second into six segments utilizing a light-weight, red-treated hand that rotates as soon as per second, pushed immediately by the oscillations of the 3Hz stability wheel. There is no such thing as a conventional gear prepare; as a substitute, a minimalist collection of low-inertia wheels effectively distributes vitality via the motion.
Greubel Forsey Nano Foudroyante
A compact and refined structure
The Nano Foudroyante mechanism is embedded inside Greubel Forsey’s first flying tourbillon, creating a visible and technical centerpiece. The foudroyante’s dial stays completely oriented to 12 o’clock, even because the tourbillon rotates – making certain optimum readability.
Greubel Forsey Nano Foudroyante dial
The timepiece includes a hand-wound flyback with 2 patents, totaling 428 elements (together with 142 for the tourbillon cage). Regardless of this complexity, the motion measures simply 31.60mm in diameter and matches inside a 37.90mm white gold case – Greubel Forsey’s most compact ever.
Greubel Forsey Nano Foudroyante
The case is fitted with a high-domed sapphire crystal, straight-grained ending on the caseband, and a clear caseback. Delicate engravings – “Nano Foudroyante” and “Greubel Forsey” – stand out in polished reduction over a hand-hammered background.
Greubel Forsey Nano Foudroyante on the wrist
A brand new chapter, totally realised
This timepiece embodies maturity and intent, created for 22 collectors who will expertise Greubel Forsey’s most energy-efficient, compact, and conceptually superior timepiece so far.
For extra info, please go to https://greubelforsey.com/en/watches/nano-foudroyante
Fast info: Nano Foudroyante in white gold Restricted Version
Hand-wound chronograph motion with 2 patents
Flying tourbillon with Nano Foudroyante • hours and minutes • small seconds
• 60-second tourbillon rotation • chronograph seconds (trotteuse)
• 60-minute counter • flyback operate
Motion
Dimensions: Diameter: 60 mm x Thickness: 40 mm
Variety of elements
- Motion: 428 elements
- Tourbillon cage: 142 elements
- Weight of the cage: 835 g
Variety of jewels - 53
- Olived-domed jewels in gold chatons
Chronometric energy reserve
- One full day, with chronograph engaged
Barrel
- Quick rotating barrel (1 flip in 7 hours) with a hard and fast principal spring bridle
Steadiness wheel
- Variable-inertia with gold mean-time screws (10 mm diameter)
Frequency
- 3 Hz/21’600 vibrations/hour
Steadiness spring
- Phillips terminal curve
- Geneva-style stud
Bridges and principal plates
- Nickel silver, frosted and noticed with polished bevelling and countersinks, straight-grained flanks, nickel-palladium remedy
- Straight-grained and flat black polished metal chronograph mechanism, polished bevelling, straight-grained flanks
- Three-dimensional column wheel, frosted and circular-grained, polished columns
- Central seconds wheel, circular-grained, polished bevelling with relief-engraved texts
- Gold plate, circular-grained, with engraved limitation quantity
Tourbillon
- Flying Tourbillon with embedded Nano Foudroyante mechanism
- Foudroyante dial, fixed vertical indication
- Titanium cage bridges, polished bevelling, straight-grained flanks, with engraved GF emblem
- Platinum counterweight
Gearing
- Involute circle profile
- Micro-module with lowered play
Shows - Hours and minutes
- Small seconds
- 60-second tourbillon rotation
- Foudroyante, sixth of a second
Chronograph
- 60-second flange
- 60-minute counter, semi-instantaneous
Exterior
Case
- In white gold with excessive domed artificial sapphire crystal
- Hand-polished bezel, caseband with hand-finished straight-graining
- Clear again with excessive domed artificial sapphire crystal
- Raised polished engraving “Nano Foudroyante” and “Greubel Forsey” on a hand-punched background
- Gold safety screws
Case dimensions
- Caseband diameter: 90 mm
- Bezel diameter: 30 mm
- Case top: 49 mm
- Top on artificial sapphire crystals: 34 mm
Water resistance
- Waterproof 3 atm – 30 m – 100 ft (commonplace NIHS 92-20/SN ISO 22810:2010)
Crown and pushers
- Crown with pusher, in white gold, engraved GF emblem
- Pusher in white gold, hand-polished
Dial
- Multi-level in gold, rhodium-coloured, minute-circle with blue end, small seconds and chronograph minutes counter with polished bevel, engraved and lacquered indications, with a visible opening for the tourbillon
- Foudroyante in mild alloy, polished bevel with flat black polished central
Fingers
- Hours and minutes in polished blued metal with Tremendous-LumiNova, hand-polished countersink, flat black polished head
- Small seconds and chronograph arms in polished blued metal, hand-polished countersink, flat black polished head
- Tourbillon and Foudroyante in mild alloy, crimson remedy
Strap and clasp: Hand-sewn textured rubber, white gold pin buckle, hand-engraved GF emblem
Value: 502’200 CHF (excluding taxes)
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