Для полноты картины по моему варианту:
РЦ.-CHF 610,000.
Спецификация:
Movement
Movement dimensions
Diameter : 36.40 mm Tickness : 11.55 mm
Number of parts
Movement : 453 parts Tourbillon cage : 86 parts Weight of the cage : 0.39 g
Number of jewels
60 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
Balance wheel
Variable-inertia with gold mean-time screws (10 mm diameter)
Frequency
21'600 vibrations/hour
Balance spring
Phillips terminal curve Geneva-style stud
Main plates
Nickel silver, frosted and spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment
Bridges
Flat black polished steel tourbillon bridge, hand-polished bevelling and countersinks Nickel silver, frosted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment Flat black polished steel screws, blued by heat treatment
Tourbillon
Inclined at a 25° angle, 24-seconds rotation Light alloy cage pillars Titanium cage bridges Gold counterweight
Gearing
Involute circle profile Tangential inclined gear on fixed wheel and profiled teeth on escape wheel pinion
Displays
Hours and minutes Small seconds 72-hours power reserve on a sector 2nd time zone GMT 24 time zone universaltime Rotating titanium globe with universaltime Summer time Day-and-night Complete view from North Pole to South Pole
Exterior
Case
Lateral window with shaped synthetic sapphire crystal Three-dimensional, variable geometry-shaped lugs Gold security screws White gold GMT pusher with raised engraving on a hand-punched background Hand-engraved individual number In white gold, with 18k gold plates, engraved, hand-finished with text, screwed to the caseband Three-dimensional synthetic sapphire crystal caseback, with integrated dome Three-dimensional, asymmetrical, synthetic sapphire crystal bezel Raised polished engraving “GMT Earth” and “Greubel Forsey” on a hand-punched background
Case dimensions
Diameter : 45.50 mm Height : 16.18 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, synthetic sapphire insert with GF logo
Hands
2nd time zone GMT indicator, red triangle Hours, minutes, small seconds and power-reserve in polished steel, black treatment, hand-polished countersinks
Strap and clasp
White gold folding clasp, hand-engraved with the GF logo Black rubber or hand-sewn alligator
Dial side
Multi-level hour-ring in synthetic sapphire, galvanic growth hour indexes, engraved and lacquered minutes and small secondsPower-reserve and GMT indicators in gold, engraved and lacquered, hand matt lappedRotating globe with day-and-night UTC indicator in synthetic sapphire, engraved and lacquered
Movement side
Synthetic sapphire disc displaying city names surrounded by 2 gold rings (UTC and summer time) engraved and lacqueredGold “summer time” plate with individual number, raised engravingSouth Pole of the globe with UTC indicator, engraved and lacquered, hand matt lapped.
Источники:
https://www.greubelforsey.com/en/col...gmt/gmt-earth/
https://www.hodinkee.com/articles/gr...th-introducing
