IWC The Tribute To Pallweber editions are based on a jumping-hour pocket watch produced in 1884. Instead of a conventional time display, they use a system of rotating, numbered discs that show the hours and minutes through large windows, while seconds are taken care of by an indicator at the six o’clock position. They are available in editions of 25 in platinum, 250 in red gold and 500 in steel. From £20,500. iwc.com