Vacheron Constantin. A very fine and rare 18K gold twin barrel tourbillon wristwatch with power reserve, Certificate of Origin and box Signed Vacheron Constantin, Genève, Tourbillon, no. 59, ref. 30050/000J, movement no. 816'589, case no. 633'246, manufactured in 1993 Movement: cal. 1760 13’’’ tourbillon, manual, twin barrels, 28 jewels, one-minute tourbillon carriage visible through an aperture, signed Dial: 18K gold “clous de Paris”, signed Case: glazed display snap on back, 38 mm. diam., signed With: 18K gold Vacheron Constantin deployant clasp, Certificate of Origin dated 8 November 1993, fitted lacquered wood presentation box and a further box with outer packaging