French gold quarter repeating pocket watch Circa 1820

Gold open faced pocket watch by Sauvage
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A large, red gold key-winding French verge pocket watch with repeater, circa 1820.
Spindle escapement (mechanism), repetition of the hours and quarter hours. Plain polished 18K gold case, signed and numbered dust cover. Beautifully enamel dial with Breguet-style radial hours, outer minutes track, and Breguet steel hands.
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Diameter: 54 mm
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Weight: 117 g
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Signed: Sauvage a Paris
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Spindle escapement, also called verge escapement, was the standard for mechanical watches from 1480 to 1720 and was even used for pocket watches until the 19th century. In the beginning, spindle escapements were still used with a verge rod, also known as a foliot, before switching to the pendulum as an oscillator. Later, the balance wheel with a mainspring prevailed, which made watches finally mobile and able to be worn on the arm – a decisive step in the history of the wristwatch.