Sophisticated Swiss gold square pendant watch Circa 1960

Gold, diamond and emerald lady’s watch
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A Swiss 18 carat gold, diamond and emerald key less pendant watch, circa 1960.
A solid, polished case, case back with four screws, bezel set with 44 baguette emeralds.
Pave set dial with round diamonds and gold dauphine hands. Rhodium plated movement, Geneva striping decoration, 17 jewels, straight line lever escapement, mono metallic balance adjusted to heat, cold, isochronism and five positions, self compensating flat balance spring.
Case and movement signed.
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Thickness: 7 mm
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Dimensions: 33 x 33 mm
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Signed: Vacheron & Constantin  Genève
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Jean-Marc Vacheron was born in 1731 and died in 1805. He founded a watch workshop in the Geneva district of Saint Gervais in 1755. In 1785 his son Abraham took over the then-still-small company. Their watches were favoured by the nobility, clergy and wealthy merchants. Sales deteriorated dramatically during the French Revolution and Abraham found himself confronted with numerous problems. He married and attached to his name, according to tradition, his wife’s surname. Thus the name of the workshop changed to Vacheron-Girod. At the beginning of the 19th Century, Abraham’s son Jacques Barthélemy Vacheron took over management of the company, which changed the name to Vacheron-Chossat. On numerous business trips to Italy, France and Germany, Jacques Barthélemy found new customers for their sophisticated products, including pocket watches with very flat movements for the time, hunting-cased watches and minute repeaters, built into expensive and elegant cases.
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In 1819, Vacheron brought in the son of a cloth merchant, François Constantin, as a partner to support the distribution of watches and the company became known as Vacheron & Constantin. Constantin had gained his first experience in the watch industry as a salesman for Jean-François Bautte and his exceptional abilities soon overcame the company’s previous financial difficulties. Sales figures rose significantly and Vacheron & Constantin began selling in New York by Jean Magnin and in New Orleans by Brey by 1830. In 1970 the ‘&’ was taken from the name, henceforth the company was called Vacheron Constantin. It is the oldest continually active watch manufacturer in the world. The brand logo is the Maltese cross. Today, Vacheron Constantin is part of the Richemont group.