MR PORTER, partners with leading watch brand Bell & Ross to release one exclusive version of six new limited-edition BR-X1 Skeleton Tourbillon Sapphire watches, debuting today at Baselworld 2018. MR PORTER is the only retailer of the Blue version of the BR-X1 Skeleton Tourbillon Sapphire – the only one in the world – where parts of the watch, including the dial, the main plate, hour and minute hands, screws, the bridges and flying tourbillon cage have a unique deep-blue finish. The full case is cut out of five blocks of sapphire.