GREUBEL FORSEY DOUBLE TOURBILLON 30° HISTORIQUE 30DDT 18K RED GOLD LTD 11P 44.5MM $505,000 LNIB LNIB 100% Authentic, comes with Box and Papers , as seen in photos. Swiss made Greubel Forsey Double Tourbillon 30° ‘ Historique’ 30DDT crafted polished finished 18k 5N Red Gold round shaped case measuring 44.5-mm diameter. Fixed 18k 5N Red Gold bezel. Manual wound movement, power reserve up to ± 72 hours. Displays a Gold-Plated Charcoal partially open-worked dial, three sapphire-crystal plates with Gold 12 Arabic numerals, baton hour markers, Gold skeleton hands, Arabic numeral indexes, minute track at outer rim. Sectorial 72-hour power reserve at 2 o’clock, a small seconds indicator at 9 o’clock and indicators for 4-minute and 60-second rotations of the two the 30° inclined double tourbillion at 6 o’clock. Crown 5N Red Gold engraved /black lacquered GF logo crown. Scratch resistant convex Sapphire crystal, transparent convex sapphire crystal caseback, engraving on background. Black Hand-sewn alligator leather strap with 18k 5N red gold folding Deployment Buckle, + Extra strap. Water resistant to 30M /99 ft. Display signed " Greubel Forsey ", Caseback inscribed & numbered, Movement signed… Vey rare, Movement... Mechanical hand-wound movement , Calibre GF 02E – 39 jewels, Frequency 21'600 vibrations, 303 parts 2 Tourbillon cages : 130 parts. Double Tourbillon 30°, Outer Tourbillon 4-minute rotation indicator, Inner Tourbillon 60-Second rotation indicator, weight of the two cages : 1.17 g, Power reserve 72 hours, Barrels Rapid rotating twin barrels (1 Turn in 3.2 hours), one of which equipped with a slipping spring avoids excess tension Balance wheel Variable-inertia/ gold mean-time screws (10.70 mm diameter) hour Balance spring...