This classically elegant Traditionnelle watch equipped with a useful and refined horological complication is powered by a mechanical self-winding movement: Caliber 2460 QCL, entirely developed and manufactured by Vacheron Constantin. Its 308 components include a 22K gold oscillating weight visible through the sapphire crystal back of the 41 mm-diameter case in 18K 5N pink gold. Beating at a frequency of 4 Hz and endowed with a 40-hour power reserve, this mechanism drives central hours, minutes and seconds hands, a complete calendar (showing the day of the week, date and month), as well as precision moon phase and the age of the moon indication. The remarkably accurate moon-phase indication requires just one adjustment every 122 years (compared with 3 years for a standard version). The visual balance and legibility of the opaline silver-toned dial – featuring gold hour-markers and bi-facetted Dauphine-type hands – are accentuated by the unusual layout of the day of the week and month apertures, placed around the dial rim. The date is shown by a slender black central hand.