Swiss gold ring watch with exposed balance Circa 1800-1820

A Swiss gold, enamel and diamond set ring watch with exposed balance, early 19th Century. Key wound and set. Marquise form table with eccentric white enamel meantime dial and upper dial for constant seconds, central exposed diamond set balance wheel, surrounded by painted enamel with floral sprays. Diamond set bezel, the underside with sliding gold panel engraved with the winding and setting instructions. Fitted with ring setting.
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