Roger Dubuis Excalibur Double Tourbillon Black ceramic

Roger Dubuis presents the Excalibur Double Tourbillon Black Ceramic, reference RDDBEX0820, a 45 mm ceramic case built for a skeletonised double tourbillon movement. The case measures 7.35 mm thick and is fitted with a sapphire crystal treated with anti-reflective coating. Inside is the manual-winding calibre RD108SQ, certified with the Geneva Seal and offering 72 hours of power reserve. The grey openworked dial exposes the two linked tourbillon carriages and their differential, joined through a display back with a black DLC titanium cover. This is a limited edition, produced in a run of 28 pieces. A black calf leather strap closes with a titanium folding clasp, also treated in black DLC. Water resistance is rated to 100 metres, adequate given the piece's largely dress-oriented, mechanical focus.