Arnold & Son caliber A&S5003 Ruthenium

Exclusive Arnold & Son mechanical movement, hand-wound, 32 jewels, diameter 37.8 mm, thickness 5.9 mm, power reserve 100 h, two barrels, 18'000 vibrations/h, Breguet spring. Movement decoration: nickel-silver movement, black ruthenium treated with Haute Horlogerie finishing: manually chamfered bridges with polished edges and brushed surfaces, mirror-polished screws.