Column wheel chronograph (seconds, 30 minutes and 12 hours counter). Tourbillon mechanism. Hours, minutes, seconds. Calibre G1780, automatic column wheel chronograph-tourbillon, 28'800 A/h (4 Hz), Incabloc shock absorber. Black gold movement with Haute Horlogerie finishing. Perlages, sandblasted, manually chamfered and polished bridges and bottom plate, column wheel with polished segments and black low-friction coating, black gold oscillating weight with skeletonised rotor and red gold (18K) segment. 34 jewels. Power reserve: 48 hours. Rhodium tourbillon cage: 48 components, 0.485 grams. Off-centre construction at 11 o'clock. Complete see-through tourbillon. Two patents. Double bridge construction with red gold (18K) coated upper bridge. Golden balance. 48 mm steel with black PVD case. Red gold (18K) right hand start / stop and reset pushers with "Clous de Paris" high grip pattern. Steel bezel with black PVD. Domed sapphire crystal, anti-reflective coating on both faces. See-through sapphire crystal case back. Water resistance - 160 feet / 50m. Black carbon dial with golden tachymeter scale on external ring. Golden hands and numerals. Strap - Black croco?. Black ceramic and titanium folding buckle. Unlike E-tailers that only provide in-house warranties, Tesoro Jewelers is a full service authorized dealer that offers the Graham Manufacturer's Warranty.
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