Swiss pendant watch with brooches, chain, key and seal Circa 1850

Gold and enamel cylinder pendant watch
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A very fine and rare Swiss 18 carat gold and enamel open faced pendant watch with two matching pearl-and-ruby-set brooches, a gold chain, key and seal made by Vacheron Constantin SA, circa 1850. Gilt brass movement, a bar caliber with going barrel, four jewels, a cylinder escapement, plain brass three arm balance, flat balance spring and an index regulator. White enamel dial with Roman numerals, an outer minute track and original gold Breguet hands. The case with a reeded band, translucent blue enamelled back with polychrome enamel flowers, chased and engraved border, central engraved leaves and a gold hinged cuvette engraved with the technical details. Signed on the cuvette, punched on the movement.
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Diameter: 33 mm
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Signed: Abm. Vacheron Girod
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Master watchmaker Abraham Vacheron Girod (1760-1845) was Jean-Marc Vacheron’s son.
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He took over his father’s workshop in 1785 and renamed the firm Abraham Vacheron Girod in 1786 following his marriage to Anne-Elisabeth Girod. He partnered with his brother-in-law Barthélémy Girod, representing an important early chapter in the lineage of what is known today as Vacheron Constantin SA.
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The company operated as Vacheron Girod until 1816, when Girod retired. It transitioned to Vacheron Chossat under Charles-François Chossat and then eventually, under Jean-Marc Vacheron’s grandson, Jacques-Barthélemy, welcomed François Constantin in 1819 to form Vacheron & Constantin.
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The historical name Abraham Vacheron Girod was revived by Vacheron & Constantin around 1822 as a secondary trade name for specific watch lines.