Chaux-de-Fonnier watch brand Corum is bubbling over with creativity as it presents the brand new Bubble model 15 years after it first launched. This timepiece was first unveiled in 2000 and surprised the world with its pioneering 44mm diameter and the magnifying effect created by the sapphire glass protecting the dial. The 2015 model is an even more spectacular feast for the eyes and comes in two limited editions: 350 of both the Vintage or All Black model are available. The steel case housing the self-winding calibre has been expanded to a diameter of 47mm; it has short lugs to better hug the wrist and the case is coated with black PVD or copper. Appearances can be deceiving as the dial is in fact flat and divided into cubes; the delightfully deceptive 8mm thick sapphire glass makes it appear domed. The dial bears leaf-shape hands, indice dots and large Arabic numerals, one of which wraps its curves around the date display. Price upon request