Greubel Forsey Balancier Assymetrique USA Exclusive Limited Edition of 11 Pieces Stainless Steel

$ 215,000.00 USD

Robert Greubel and Stephen Forsey have been pushing the limits of fine watchmaking for many years now, tackling the challenges of complexity every day. And yet, after the Double Tourbillon 30°, the Quadruple Tourbillon, the Tourbillon 24 Secondes and many other bold complications like the Grande Sonnerie, the “Balancier” was self-evident. Greubel Forsey was bound one day to create a timepiece of great purity, featuring a unique and original balance wheel

Movement
Movement dimensions
Diameter : 36.40 mm
Tickness : 8.35 mm
Number of parts
Movement : 269 parts
Number of jewels37
Olived-domed jewels in gold chatons
Chronometric Power Reserve 72 hours
Barrels Two 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 In-house variable-inertia with 6 gold mean-time screws (12.60 mm diameter)
Stop balance activated by crown
Frequency 21'600 vibrations/hour
Balance spring Phillips terminal curve
Geneva-style stud
Main plates Nickel silver, frosted and spotted, straight-grained flanks, nickel-palladium treatment
Bridges Nickel silver, frosted and spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment
Flat black polished and barrel-polished steel balance wheel bridge, hand-polished bevelling and countersinks, straight-grained flanks
Gearing Involute circle profile
Displays Hours and minutes
Small seconds
72-hours power reserve on a sector Exterior
Case In stainless steel with asymmetrical convex synthetic sapphire crystal
Transparent back with synthetic sapphire crystal
Lateral window with shaped synthetic sapphire crystal
Three-dimensional, variable geometry-shaped lugs
Raised polished engraving “Balancier” and “Greubel Forsey” on a hand-punched background
Gold security screws
Hand-polished bezel, caseband with hand-finished straight graining
Hand-engraved individual number
Case dimensions
Diameter : 43.50 mm
Height : 13.94 mm
Water resistance of case
Water-resistant 3 atm - 30 m - 100 ft (Standard NIHS 92-20/SN ISO 22810:2010)
Crown In White gold with engraved and black lacquered GF logo
Dial Hour-ring in gold, hand matt lapped, engraved and black lacquered hour indexes, minute-circle and « Greubel Forsey »
Small second and power-reserve indicators in gold, engraved and black lacquered, hand matt lapped
Hands Hours and minutes, small seconds and power -reserve in polished blued steel, hand-polished countersinks
Strap and clasp Hand-sewn alligator
White gold pin buckle, hand-engraved with the GF logo
Movement side
Flat black polished gold plate with raised engraved text, polished bevelling and countersinks, straight grained flanks with apparent gold chatons
Flat black polished gold central plate, "GF" engraved with individual number, polished bevelling and countersinks, straight-grained flanks