DEWITT ACADEMIA TOURBILLON FORCE CONSTANTE CHAIN DRIVE AC.8050.20.M1020 PLATINUM LIMITED 50 PIECE EDITION RETAIL $290K NEW NIB 100% Authentic, comes with Box and Guarantee Card (Papers), as seen in photos. Swiss made DeWitt Academia Tourbillon Force Constante Chain Drive AC.8050.20.M1020 crafted from 950 Platinum round shaped case, adorned with DeWitt’s imperial columns pattern on the flanks measuring 43mm diameter. Fixed Platinum bezel, straight intergraded lugs. Mechanical manually wound movement, power reserve up to ± 72hours. Displays a Black emblematic semi skeleton open work dial with Black colored background decorated with elegant strips. Large opening for the Tourbillon cage and Constant Force system as well as for the power-reserve indication and the miniature chain. Open-worked hours and minutes hands in the shape of two-edged swords. Platinum polished crown featuring the “W” signature. Scratch resistant Sapphire crystal, display Sapphire crystal casebacksecured by 6 screws, engraved “Academia Tourbillon Force Constante” DeWitt 8050.20 Genève #of50. Black Crocodile leather Strap with White Gold “W” Deployment Buckle. Water resistant to 30m / 99ft. Display signed " DeWitt ", Caseback inscribe & numbered, Movement signed….Limited to 50’ piece Platinum Edition… Movement... Mechanical manually wound movement integrating a Flying Tourbillon mechanism with Constant Force... Caliber DW8050-27 jewels, 21,600 Vph .. Special, 4-armed Gyromax balance, Spiral: Flat Escapement: 520 angle of lift.. Power-reserve with chain-driven device, indicated on a worm screw. The miniature chain is composed of 192 parts, entirely realized by hand. Hand bevelled and decorated with Côtes de Genève movement.......