Romain Gauthier Logical One BTG boasts a black ADLC titanium case and anthracite ADLC treated mainplate. The darkness of these elements superbly sets off the ink blue hour-minute subdial and small seconds made from oven-fired enamel. The blue enamel is slightly translucent, allowing the 18k white gold dial plate beneath to occasionally flash into sight.
Equally, the sleek case and main platform a neat contrast to the 18k white gold pusher and crown, the balance bridge and escape wheel bridge in bright palladium-treated brass, and the upper ‘bar’ bridge for the constant force system in light-hued natural titanium.
A paragon of fine Swiss watchmaking, Logical One is Romain Gauthier’s Grand Prix de Genève-winning creation that contains a revolutionary snail cam and friction-minimising ruby-link chain, plus sapphire-lined mainspring barrel, to offer nearly two days of constant force – the holy grail of precision watchmaking.
Logical One BTG’s movement was conceived, developed, produced, decorated, assembled and regulated at Manufacture Romain Gauthier in the Vallée de Joux, Switzerland. The spectacular decoration includes hand-created and hand-polished rounded bevels, hand-frosting, snailing, straight-graining, circular-graining as well as hand-polished jewel countersinks.
Logical One BTG is a 5-piece limited edition.
Model: Logical One BTG by Romain Gauthier
ADLC titanium case with white gold pusher and crown featuring ADLC and palladium-treated movement – 5-piece limited edition
Features and indications
Hours, minutes, small seconds; 46-hour power reserve indicator; push-button winding; innovative chain-and-fusee style constant force system featuring snail cam and ruby-link chain
Dial and hands
Oven-fired blue enamel dial on an 18k white gold base complemented by 18k white gold hands and silvered numerals
Movement and finishing
Dimensions: 35.5mm x 10.5mm
Power reserve: 46 hours
Number of jewels: 63 in total, including 26 for the constant-force chain
Number of components: 359
Balance frequency: 28,800 vph / 4Hz
Movement components in: steel, stainless steel, beryllium copper, brass, titanium and German silver
Finishing: Highest-level haute horlogerie finishing
Case material: Black ADLC-treated Grade 5 titanium
Dimensions: 43mm x 14.2mm
Water resistance: 30m/3atm/100ft
Sapphire crystal with interior anti-reflection coating, front and display back
18k white gold crown for time setting at 2 o’clock
18k white gold crown push button for winding at 9 o’clock
Strap and buckle
Matte black alligator leather strap with light grey stitching, hand-stitched in Switzerland with 18k white gold pin buckle
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