Franco Sbarro, a brilliant creator of concept cars and prestigious inventor of technological solutions created the Montresbarro EV-1 watch. This “empty” watch revolutionizes the art of time by allying the golden rules of watch making expertise to a unique avant-garde vision. In making the watch, an existing caliber had to be totally rethought to achieve the technical prowess of obtaining precision from an off-centre movement which acts on the double crown of the watch. The most astonishing part of the watch is the motor which is situated between the two crowns and disks with more than 300 teeth had to be made to obtain an adequate multiplication ratio to ensure reliable working of the watch. To make the watch water-resistant was another challenge of the imagination and the creation of specific tooling for the watch case.