Arnold & Son pushes precision chronometry ever further with the Constant Force Tourbillon, featuring a patented constant force device with 60-second tourbillon and true beat seconds. The symmetrical movement architecture of the Constant Force Tourbillon movement pays tribute to Arnold & Sons’ historic marine chronometers. At the top, two visible mainspring barrels and the constant force device provide optimal power to the tourbillon at the bottom of the dial.

£161,500

Specifications

Functions
Hours, minutes, small seconds
Caliber
Exclusive Arnold & Son mechanical movement, hand-wound, 39 jewels, diameter 36.8 mm, thickness 6 mm, power reserve 90h, double barrel, 21,600 vibrations/h
Movement Decoration
Nickel-silver and steel movement, palladium treated bridges and NAC grey treated main plate with Haute Horlogerie finishing: hand-chamfered bridges with polished edges and brushed surfaces, screwed gold chatons, screws with bevelled and mirror-polished head.
Tourbillon cage
Mirror-polished with hand-chamfered polished edges and circular satin-finished surfaces.
Case
18-carat red gold case, diameter 46 mm, cambered sapphire with anti-reflective coating on both sides, see-through sapphire case back
Dial
Anthracite open dial
Starp
Hand-stitched brown bottier alligator leather with patina
Water Resistance
30 meters