The Manufacture Rodolphe Cattin Witness One is an openworked tourbillon with bevelled and diamond-polished hands, finely sandblasted surfaces and black gold-treated bridges. A 60-second tourbillon displays the seconds at 6 o’clock. A three-arm “octopus spring” operates the pull-out piece. A click and lever govern the movement, which is visible through the caseback.

Powering the Witness One is hand-wound tourbillon caliber MRC800 with 19 jewels, a frequency of 21,600 vph (3Hz), lever escapement, skeletonised plate and bridges, 72-hour power reserve. Functions include hours, minutes and seconds (tourbillon). The 45 mm round case has distinct oversized lugs and a large ball-like crown – available in steel, 18K white gold or 5N 18K pink gold.

Cambered anti-reflective sapphire crystal and transparent caseback. Water-resistant to 30 meters. Polished and blued facetted hands. Black alligator with folding clasp matching the case.