VACHERON CONSTANTIN JOAILLERIE DUOPLAN Serial number: 528052P. Case in 18k yellow gold. Bezel and handles set with diamonds. Dial entirely set with diamonds. Duoplan" hand-wound mechanical movement. Black satin strap on 18k yellow gold folding clasp signed Cartier. Sapphire crystal. Circa 1970. Dimensions: 22 x 31 mm. Gross weight: 41.9 g. An 18k gold wristwatch mechanical movement, by Vacheron Constantin. Circa 1970. RC : Sold as is, traces of wear and use. Movement functional at time of writing, no warranty.