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GRAHAM REF. 2TWT TOURBILLOGRAPH LIMITED EDITION PVD COATED STEEL Graham, London, Tourbillograph, Swiss, No. 038/100, Ref. 2TWT. Made in a limited edition of 100 pieces in circa 2010. Fine and unusual, large, self-winding, water resistant, PVD coated steel wristwatch with one-minute tourbillon regulator, round button chronograph, register and a titanium Graham deployant clasp. Accompanied by the Certificate of Origin, guarantee and instructions. Three-body, PVD polished, rounded band, straight and curved lugs, transparent case back with 6 screws, sapphire crystals. Bicolor matte black and silver with applied steel radial Arabic numerals, outer minute/seconds track with Arabic quarter markers, at 11 aperture for the tourbillion, subsidiary 12-hour register and silver ring 30-minute register dials. Luminous steel epÈe hands. Cal. G 1781, rhodium-plated, oeil-de-perdrix decoration, 34 jewels, straight-line lever escapement with one-minute tourbillon regulator, monometallic balance, shock absorber, self-compensating flat balance spring.