Case in black titanium, with ADLC (Amorphous Diamond-Like Carbon) treatment, 43 mm diameter, 15 mm thick, waterproof to 3 bar/30 metres
Pusher for winding the watch, white gold
Chain-and-fusee style constant force system
Blue enamel dial on a gold base, white gold hands
In-house movement, power reserve 46 hours, 63 jewels including 26 for the constant-force chain, 359 components
Balance running at 28,800 vibrations per hour/4 Hertz
Crown for time-setting, white gold
Matte black alligator leather strap with light grey stitching, titanium pin buckle
Price 115,000 Swiss francs
Logical One BTG is a variant by Romain Gauthier of his Logical One. It is a five-piece limited edition, with black titanium ADLC (Amorphous Diamond-Like Carbon)-treated case and anthracite ADLC mainplate, and subdials for time indications in blue enamel. The pusher at 9 o’clock, used to wind the watch, and the crown, are in white gold.
Each piece costs 115,000 Swiss francs.