On the occasion of its 260th anniversary, Vacheron Constantin unveiled the Harmony collection at the SIHH 2015. Housed in an unusual cushion-shaped case, Vacheron Constantin is now introducing ten new references equipped with several in-house calibres and developed around the chronograph, tourbillon or dual time complications. Out of these new ten timepieces within the Vacheron Constantin collection, one that stands out and that we absolutely love is the remarkable Harmony complete calendar equipped with an unprecedented in-house movement.