Arnold & Son caliber A&S8513
Exclusive Arnold & Son mechanical double tourbillon movement, hand-wound, 42 jewels, diameter 37.3 mm, thickness 8.35 mm, power reserve 90h, double barrel, 21,600 vibrations/. Movement decoration: nickel-silver movement, rhodium treated with superlative Haute Horlogerie finishing: hand-chamfered bridges and polished edges, fine circular graining and Côtes deGenève rayonnantes, plate dial side with Côtes de Genève, circular satin-finished wheels with hand-chamfered and polished edges, blued screws with bevelled and mirror-polished heads. Tourbillon: 18-carat red gold bridges, satin-finished and mirror polished surfaces with hand-chamfered and polished edges. Hand-chamfered and mirror-polished tourbillon cages.