The Vacheron Constantin Harmony Split-Seconds Ultra Thin reference 5400S/000P-B057 is a limited edition of 10 pieces introduced in 2015. The cushion-shaped case of 42mm is rendered in platinum. Inside ticks the self-winding caliber 3500/260, which -at a slender height of 5.2mm- features a split-seconds chronograph and power reserve indicator.
