Sovereign Platinum - Platinum Guilloché

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The BCHH Sovereign

The Sovereign is the supreme expression of the luxury sports watch - of impeccable construction and craftsmanship, encased in a sleek futuristic case of solid platinum, with a magnificent ultra-thin microrotor movement finished to the highest standards of classical haute horlogerie. Available with a choice of aventurine, white jade, green jade or solid platinum dials.  

Do note that the engine-turned guilloché pattern of the dial may be completely customised to your choice. The pattern depicted in the images here is the "Ecaille de Poisson", which we believe particularly exemplifies the harmony of the Sovereign. The subsidiary seconds dial is encircled with concentric guilloché circles. Our guillochage is done the traditional way by a skilled artisan engine-turning the pattern by hand using centuries-old antique machinery, at dial atelier Comblémine.

Movement -

• Vaucher Manufacture Fleurier Calibre 5401/32 or 33 with signed tungsten gold rotor (Client may choose either version of the Calibre 5401)
• BCHH is the first brand in the world to use both of these calibres, which are the latest versions of the Vaucher 5401 microrotor featuring a significantly improved rotor design, resulting in superior chronometry
• Microrotor automatic movement with haute horlogerie finishing
• Variable inertia balance with gold inertia blocks allows for better operating stability
• Rapid rotation barrel
• Tungsten Gold microrotor with sunray brushing
• Height 2.6mm
• Diameter 30.00mm
• 21,600 vph
• Approx 48 hour power reserve
• Mobile stud holder
• Flat balance
• 160 components
• 29 rubies

Movement Finishing and Special Characteristics -

• Circular-grained plate on dial side and bridge side
• Fine circular-graining under balance, rhodium-plated
• Bridges with Côtes de Genève decoration, rhodium-plated
• Bicolour engraving
• Bevels, counterbores and apertures diamond-polished
• Ceramic ball bearings
• Pivots and flanges rolled
• Wheels circular-grained on two faces
• Flat-head screws, polished
• Bridges hand-bevelled with piercer
• Vaucher CLA Chronometry certification

 Dial and Hands -

• Choice of aventurine, white jade, green jade or solid platinum dials
• Octagonal faceted hour markers with diamond angles, each facet individually black polished by hand
• Complex faceted lumed skeletal hour and minute hands
• SuperLuminova X1 lume

Case -

• 950 Platinum
• Crown signed BCHH
• 150m water resistant
• 40mm case diameter
• 8mm thin
• 20mm strap width at lugs
• Flat front sapphire crystal with AR coating
• Rear sapphire crystal
• Case finishing comprising high mirror polish, satin and circular brushing, all done by hand

 Strap -

• Signed 950 Platinum tang buckle 
• Bespoke hand-stitched and hand-edged leather strap with a wide range of skins available
• Strap colour, lining colour and stitching thread colour are all personalised to the client's wishes