This year at the SIHH 2017, Roger Dubuis announced its partnership with Pirelli and a strategy based on disruptive materials and progressive complications. As part of their new alliance with Pirelli, there are two new watches —the Excalibur Spider Pirelli Double Flying Tourbillon and the Excalibur Spider Pirelli Automatic Skeleton — that we'll talk about in a couple of days. A watch that is not part of this alliance but one of the most impressive timepieces unveiled at the Salon this year is the new Roger Dubuis Excalibur Quatuor Cobalt Micro-Melt.