French repeating coach clock with Grande Sonnerie Circa 1800

Silver open faced carriage clock by Berthoud
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An important and complex French carriage clock with Grande Sonnerie, repeater and alarm, circa 1800. Original silver case with sound openings and bell. Very complex verge movement with self-striking quarters, repeating hours and quarters, alarm, disengageability, Petit Sonnerie, and Grande Sonnerie. Original enamel dial with Roman hours, Arabic minutes and original hands. The key of this rarity is probably original.
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Diameter: 102 mm
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Weight: 880 g
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Signed: Berthoud a Paris