Automatic movement with center seconds, minutes and hours, developed and crafted in-house by Vacheron Constantin. Oscillating at a rate of 28,800 vibrations per hour, this self-winding calibre equipped with a 22-carat gold oscillating weight ensures an approximately 40-hour power reserve. In line with the grand tradition of calibres from the Manufacture, the bridges are manually cut out and bevelled, the sides are hand-drawn with file strokes and each screw is meticulously polished.