Our friends at Greubel Forsey have unveiled a new timepiece showcasing a large, high precision and inclined balance wheel within a 100 metres water resistant titanium case tailored for the most active lifestyle.

Circular from above, this case reveals the unique arched ovoid shape from other angles, the new ‘Balancier S’ achieves a slim profile, reinforcing its dynamic new momentum.

The rubber crown and caseband with rubber inserts assure excellent grip and protection of the timepiece. The oval, arched sapphire crystal follows the curvature of the case. The perfect osmosis between the case and the movement is emphasised, technically and visually, by a daring double suspended arched bridge holding an inclined gear train and curved central hour and minute hands. 

The large inclined balance wheel at 7 o’clock stands out. Aiming above all to improve chronometry, it maximises the space offered by the arched case and sapphire crystal, inextricably linking form and function. 

Sketch Balancier S

The exceptional chronometry of this Greubel Forsey creation is combined with an unequivocally sporty case. Made of titanium and water resistant to 100 metres, its powerful case shape is distinguished by its lightness and comfort on the wrist. Its robustness protects the movement, in particular its large balance wheel, tested in the Greubel Forsey EWT Laboratory assuring its reliability and chronometric performance at all times. The flexible and resistant rubber strap reinforces the sporty dimension, with all the comfort of a titanium folding clasp.

Technical Specifications

Movement
Movement dimensions
• Diameter : 37.00 mm
• Thickness : 10.62 mm

Number of parts
• Movement : 308 parts
• Escapement platform : 68 parts

Number of jewels
• 42
• Olived-domed jewels in gold chatons

Chronometric 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
• Relief-engraved text, circular-grained, black treatment, polished chamfer

Balance wheel
• In-house variable-inertia with 6 gold mean-time screws (12.60 mm diameter)

Frequency
• 21,600 vibrations/hour

Balance spring
• Phillips terminal curve
• Geneva-style stud

Bridges and main plate
• Titanium
• Frosted, polished bevelling and countersinks
• Multi-level, suspended-arch bridge, polished with black treatment in relief, polished bevelling and countersinks
• Movement side, frosted bridges, polished edges and bevelling
• Gold plate with engraved limitation number, circular-grained, polished bevelling and countersinks, straight-grained flanks

Escapement platform
• Inclined at a 30° angle
• Titanium, frosted, polished countersinks, large straight-grained inclined facet, black treatment
• Multi-level, titanium balance wheel bridge, polished with black treatment in relief, polished bevelling and countersinks

Gearing
• Involute circle profile
• Inclined gear and profiled teeth on intermediate wheels of the sethands mechanism and small seconds

 Displays
• Hours and minutes, on suspended arch bridge
• Small seconds
• 72-hours power reserve on a sector

Exterior
Case
• Titanium with curved synthetic sapphire crystal
• Three-dimensional, variable geometry-shaped bezel with raised engraved text
• Profiled lugs, screwed fixing
• Caseband with rubber
• Transparent back with high domed synthetic sapphire crystal
• Titanium security screws
• Raised engraving “Balancier Incliné” and “Greubel Forsey”

Case dimensions
• Caseband diameter : 43.00 mm
• Bezel diameter : 45.00 mm
• Case height : 13.75 mm
• Height on synthetic sapphire crystals : 15.60 mm

Water resistance of the case
• Water-resistant 10 atm – 100 m – 328 ft (standard NIHS 92-20/SN ISO 22810:2010)

Crown
• Titanium and rubber with GF logo
• Colour-coded rubber capping, interchangeable

Dial side
• Three-dimensional, variable geometry hour-ring, with lacquered hours and minutes indexes
• Power-reserve indicator, engraved and lacquered
• Gold small seconds dial, rhodium-coloured, polished bevel

Hands
• Hours and minutes, curved profile, polished steel
• Small seconds, red finish
• Power-reserve in polished steel, flat black polished head

Strap and clasp
• Rubber with text in relief
• Titanium folding clasp, engraved GF logo

For more information please visit https://www.greubelforsey.com

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