Excalibur is the name of the iconic collection from Roger Dubuis, featuring the Excalibur Spider Full Carbon and the Excalibur Quatuor Cobalt MicroMelt. And now the Excalibur Spider Carbon is being lauded for its daring use of carbon for the case and the movement — the first watch in the world to do so. It will also be the first such watch to earn the Poinçon de Genève certification, marking a significant step forward for the official standard of Geneva watchmaking. For this watch, Roger Dubuis has introduced not only a case (and lugs) but also movement mainplate, bridges and tourbillon upper cage all in multi-layered carbon. It is this multi-layered part that caused some consternation for the Geneva Seal, which does not allow composite materials. As the watchmakers at Roger Dubuis point out though, all the layers are T700 carbon, so the material is not a composite per se. The watch is a manual-winding Calibre RD509SQ, with a 70-hour power reserve, and a 45-millimetre carbon case.
