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| Courtesy of Graham |
Functions Column wheel chronograph (seconds, 30 minutes and 12 hours counter). Tourbillon
mechanism
Hours, minutes, seconds
Calibre Calibre G1780, automatic column wheel chronograph-tourbillon, 28'800 A/h (4 Hz),
Incabloc shock absorber
Rhodium blackened 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, ruthenium oscillating
weight with skeletonised rotor and 925 sterling silver segment
34 jewels
Power reserve: 48 hours
Ruthenium tourbillon cage: 48 components, 0.485 grams. Off-centre construction at
11 o'clock. Complete see-through tourbillon. Two patents. Rhodiated double bridge
construction with black varnish coated upper bridge. Golden balance
Case 48 mm steel
Steel right hand start / stop and reset pushers with "Clous de Paris" high grip pattern
Steel bezel?
Domed sapphire crystal, anti-reflective coating on both faces
See-through sapphire crystal case back
Water
resistance
160 feet / 50 m
Dial Black dial with tachymeter scale on external ring, black snailed minutes and
seconds counters
Rhodiated central hours and minutes hands with black Super-LumiNova coating,
rhodiated chrono, hours, minutes and seconds counters hands, rhodiated numerals
Strap Black croco
Steel folding buckle
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