For sale at Debonar Watches: pre-owned Vacheron Constantin Patrimony Perpetual Calendar 43031, in 18k yellow gold, with a generic strap.The Vacheron Constantin Perpetual Calendar, Ref. 43031 makes a spotless dress watch, beating horological intricacy and refinement. A circular finish of these, somewhat recessed, QP-dials – testifying a moonphase made from lapis lazuli, weekday, month and leap year indicators, and the date – ensures a stunning perception of depth, brightening up artistically when the light falls on it. First launched in 1984, the Vacheron Constantin ref. 43031 was one of the pieces which helped renew the interest in complicated watchmaking, following the decimation caused by the Quartz Crisis. Alongside similar pieces from Audemars Piguet and Patek Philippe, it is one of the few ultra-thin, automatic perpetual calendars introduced during this period.The Vacheron Constantin Perpetual Calendar, Ref. 43031 houses an automatic movement.A bit of its story:Vacheron Constantin was founded in 1755 in Geneva by Jean-Marc Vacheron. Vacheron, known to be a good friend of philosophers Jean-Jacques Rousseau and Voltaire – sharing an interest in ideas centered around the intellectual movement of the time, reflected both in science and watchmaking – passed his watchmaking spirit and horological complications archive on towards his son and grandson Jacques-Barthélemy, who started his collaboration with François Constantin in 1819. BRAND VACHERON CONSTANTIN MODEL PATRIMONY PERPETUAL CALENDAR REFERENCE 43031 CASE MATERIAL 18K GOLD MOVEMENT AUTOMATIC DIMENSION 36 MM DIAL WHITE BEZEL 18K GOLD CRYSTAL SAPPHIRE BRACELET TYPE STRAP (GENERIC) BRACELET MATERIAL LEATHER BRACELET LENGHT 17 CM ORIGINAL BOX NO ORIGINAL PAPERS NO YEAR 1992 CONDITION VERY GOOD