Swiss. A fine, rare and unusual 18K gold, enamel and pearl-set butterfly-form watch with key and box

Swiss. A fine, rare and unusual 18K gold, enamel and pearl-set butterfly-form watch with key and box
Unsigned, case no. 1888, circa 1820
Gilt-finished verge movement, chain fusée, pierced and engraved balance cock, white enamel dial, Breguet numerals, light blue champlevé enamel fleur-de-lys decorated inner case, hinged polychrome enamel butterfly-form case, pearl-set antennas, short length of gold chain and key, unsigned, case numbered 1888
38 mm. wide