Greubel Forsey Signature 1 Platinum

After presenting Signature 1 red gold and white gold models last year, Greubel Forsey now offers a new platinum version of the watch with an anthracite black-coloured gold dial.

Long-time team member at Greubel Forsey, Didier Cretin inaugurated the Signature series in 2016, for which one watchmaker, chosen for their talent and original approach to watchmaking, creates their own timepiece within Greubel Forsey’s universe and cosigns it with Robert Greubel and Stephen Forsey.

Greubel Forsey Signature 1 Platinum watch

This project, which aims to showcase watchmaking skills, is reminiscent of the Naissance d’une Montre project, which archives techniques that are starting to disappear.

Didier Cretin designed a hand-wound watch with three hands, without a tourbillon function, which instead features an exclusively designed Greubel Forsey balance wheel. In this new version in platinum, the off-centred placement of its dial in anthracite black-coloured gold forms a contrasting counterpoint to the mechanical contents.

Greubel Forsey Signature 1 Platinum

The dial, minimal and flat, invites the eye to explore the interwoven lines of the watch’s metallic, architectural depths. The hour-ring and minute-circle appear in white. An individual number is engraved by hand on the back of the timepiece.

A total of eleven platinum Signature 1 pieces will be produced.

Technical details

Model: Greubel Forsey Signature 1 Platinum

Edition
Limited to 11 pieces

Other versions
11 pieces in white gold, 11 pieces in 5N red gold, 11 pieces in platinum and 33 pieces in steel

Movement Specifications

Hand-wound Calibre GFS1 movement
Greubel Forsey timepiece with 3 hands (hour, minute and small second) co-created with Didier J. G. Cretin • GREUBEL FORSEY balance wheel system

Movement
Diameter: 34.40 mm
Thickness: 7.40 mm

Number of parts
• Complete movement: 190 parts
• Escapement platform: 61 parts
Number of jewels: 21; Olived-domed jewels in gold chatons

Power reserve: 54 hours

Barrel
• Barrel equipped with a fixed mainspring-bridle Winding system with sliding click
• Black polished click incorporated into the barrel bridge
• Snailed click wheel and ratchet, polished and bevelled ratchet teeth

Balance: In-house variable-inertia with 6 gold mean-time screws (12.60 mm diameter)
Frequency: 18’000 vibrations/hour
Balance spring: Phillips terminal curve; Geneva-style stud
Main plates: Nickel silver, frosted and spotted, with straight-grained flanks, polished bevelling and countersinks, large polished inclined facets, black PVD treatment

Bridges
• Nickel silver, Côtes de Genève, frosted and spotted, with straight-grained flanks, polished bevelling and countersinks, large polished inclined facets, nickel-palladium treatment
• Circular-grained steel barrel bridge, hand-polished bevelling and countersinks
• Gold plate engraved with the individual number

Escapement platform
• Straight graining steel escapement platform, hand-polished bevelling and countersinks
• Polished steel pillars
• Flat black polished steel balance wheel bridge, hand-polished bevelling and countersinks
Gearing: Involute circle profile

Displays
Hours and minutes
Small seconds

Case
In 18k gold, platinum 950 or steel with convex synthetic sapphire crystal
Diameter: 41.40 mm
Thickness: 11.70 mm
Transparent back with synthetic sapphire crystal
Raised engraving “Signature 1” and “Greubel Forsey”
Gold security screws
Polished and straight-grained bezel
Polished and straight-grained caseband
Hand-engraved individual number (for the 18k gold and platinum 950 versions)
Water-resistant: 3 atm – 30 m – 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown: In 18k gold, platinum 950 or steel with engraved and black lacquered GF logo

Dial
18k gold versions: White silvered gold, GREUBEL FORSEY, hours and minutes in black, diamond finished bevel
Stainless steel version: Black-anthracite gold dial, GREUBEL FORSEY, hours and minutes in white, diamond finished bevel
Platinum 950 version: Black-anthracite gold dial, GREUBEL FORSEY, hours and minutes in white, diamond finished bevel
Small second in white silvered gold, diamond finished bevel

Hands
18k gold and steel versions: hour and minute hands in polished blued steel, hand-polished countersinks
Platinum 950 version: hour and minute hands in polished gold, hand-polished countersinks
Small second in polished blued steel, hand-polished countersink

Strap and clasp
Hand-sewn, alligator and leather
18k gold, platinum 950 or steel pin buckle, hand-engraved Greubel Forsey logo (for the 18k gold and platinum 950 versions)

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