It incorporates a sky chart, a complication that is becoming a speciality of Vacheron Constantin. Reference 57260, which has fifty seven difficulties, also features a sky chart, notably accompanied by sidereal time plus a secular Hebrew calendar. In 2017, Vacheron Constantin once again innovated with Calibre 3600, powering displays of https://www.watchesworld.com/centuries-of-watchmaking-tradition-with-vacheron-constantin/