Swiss yellow gold quarter repeating pocket watch Circa 1840

Unsigned open faced cylinder pocket watch
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A Swiss, yellow gold quarter repeating key-winding pocket watch, studded with pearls, circa 1830-1850.
Gilt movement, calibre 17, cylinder escapement. Gold dial, cartouches with Roman hours, outer minute divisions, engine-turned centre, subsidiary seconds at six, original blued steel Breguet hands, and one horological complication: · Quarter-repeater on two steel gongs (activated by depressing the pendant). Round-shaped yellow gold case with pearls, case (by BC, Geneva).
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Diameter: 47 mm
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Unsigned, probably Geneva
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Many half-pearls are missing; many others are falling out.