CHOPARD QUATTRO TOURBILLON PLATINUM LIMITED EDITION Chopard, GenËve, "L.U.C Quattro Tourbillon," No. 40 / 50, movement No. 102462, case No. 1210432, Ref. 16/91901. Made in a limited edition of 50 pieces in circa 2010. Very fine and very rare, water-resistant, platinum Chronometer wristwatch with visible one-minute tourbillon regulator, 8-day power-reserve and an 18K white gold Chopard double deployant clasp. Accompanied by the original fitted wooden box, Certificate of limited edition, technical instructions and Guarantee. Three-body, solid, polished, concave lugs, transparent case back with 8 screws, sapphire crystals. Skeletonized, outer rind with radial Roman numerals and luminous dart indexes, sector for the 8-day power reserve indication at 3, aperture for the tourbillon regulator under a polished steel bridge at 6, carrying the subsidiary seconds hand. Luminous blued steel dauphine hands. Cal. L.U.C. 4TT, rhodium-plated, fausses cotes decoration, 33 jewels, lateral lever escapement with tourbillon regulator with 3 curved steel arms, 4-arm Variner balance with 4 eccentric timing weights, adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating free-sprung Breguet balance spring.