Graham – Silverstone Tourbillograph Full Black

If the Silverstone Tourbillograph Full black were a character, no doubt it would be wearing a dinner jacket. A bespoke solid black one. Not so much that it would want to have a manicured life and sit in the best receptions, drinking champagne and smoking a cigar. Maybe partly because of its British heritage and tendency to always look smart. But most probably it would be wearing a dinner jacket to live an adventurous life, driving fast cars on and off the track. Breathing a special mixture of adrenaline and pure oxygen. Bringing mind and soul to a state of hyper-consciousness. Enjoying every bit of life! Because here at Graham, we think life would not be worth living without spice. Loads of it. We are risk-takers, and so are our watches.

The Silverstone Tourbillograph Full black is an automatic column-wheel chronographtourbillon.
A Tourbillon. Not any Tourbillon. It is an automatic one minute Tourbillon developed in the vein of the Graham DNA, with a powerful design and a rich technological content. The cage offers unique full size dimensions (42 mm opening) and a see-through view on the beauty of the mechanism. The 48 components of its skeleton cage interlace in layers and has been reduced to an extreme weight of only 0.485 grams. This construction, called cintré integrates the Tourbillon into the complex chronograph movement while using a large diameter balance wheel. Made exclusively for Graham by our partners Manufacture La Joux-Perret, it is the result of a 4 year R&D program leading to two patents. Altogether, the engineering know-how has lead to doing away with the intrinsic weaknesses of tourbillons. First its fragility. The reduced number of components, lightness and double-bridge construction guarantee stability and perfect rigidity. We call it a shockproof Tourbillon. Second, the sensitiveness to magnetism is also reduced through the systematic use of iron free components in the Tourbillon cage. The Tourbillograph calibre is equipped with a high quality chronometric escapement beating at 28’800 A.

A Tourbillon. Not any Tourbillon. The Tourbillograph combines a Tourbillon and a chronograph. Not any chronograph. A column-wheel chronograph.

This movement offers at the same time the beauty of one of the best see-through Tourbillon cage and the resistance of a military watch. How do we know? We have put it to the test. Not any test. This movement has successfully passed the Chronofiable test, the gold standard in the watch industry. And it is to date the only automatic Tourbillon that has passed.

Aesthetically, the Silverstone Tourbillograph Full Black is a sophisticated and classy racing instrument. The 48mm thin steel case is PVD-coated with black titanium carbide. So is the bezel. Its black dial and polished rhodiated numerals play with the light. Sometime visible, sometimes invisible. One minute Dr Jekyll, Mr Hyde the next. All is a question of perspective. Like wearing a dinner jacket to live a risky life.

Our passion for refined details led us to decorate and blacken every single part of the movement with rhodium. The oscillating mass with a ceramic ball bearing wheel, the balance, the double bridge, the coq, are all black. A perfection even pushed to such details as having a fine regulating system with a micro metric screw on the balance wheel to optimize its adjustment and avoid variations. Even the column wheel alternates black and polished.

Movement – Calibre G1780, automatic column wheel chronograph-tourbillon, 28’800 A/h (4 Hz), Incabloc shock absorber. Blackened movement finished with perlages, manually chamfered and polished edges, column wheel with silver polished segments on base cog wheel with black low-friction coating, skeletonised rotor with “black gold” oscillating weight. 34 jewels. Power reserve – 48 hours. Blackened tourbillon cage: 48 components, 0.485 grams. Off-centre construction at 11 o’clock. Complete see-through tourbillon. Two patents. Double bridge construction with black PVD coated upper bridge. Black ruthenium balance.

Functions – Column wheel chronograph (seconds, 30 minutes and 12 hours counter). Tourbillon mechanism. Hours, minutes, seconds.

Case – 48 mm steel with black PVD case. Steel with black PVD right hand start / stop and reset pushers with “Clous de Paris” high grip pattern. Steel with black PVD with black carbon ring. Domed sapphire crystal, anti-reflective coating on both faces
See-through sapphire crystal case back.

Dial – Black dial with tachymeter scale on external ring. Rhodiated hands and numerals.

Water resistance – 160 feet / 50m.

Strap – Black croco. Black ceramic folding buckle.

Source: Graham London

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