Swiss gold half hunting cased pendant watch Circa 1870

Gold half hunting cased pendant watch
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A Swiss yellow gold half hunting cased keyless lever pendant watch, circa 1870, gilt jeweled movement, with moustache lever escapement, cut bimetallic balance, moustache lever escapement, index regulator.
White enamel dial, Roman numerals, 18k yellow gold case, finely engraved with foliate motif, blue enamel Roman numerals to the front, monogram to the reverse, yellow gold hinged cuvette, cuvette and movement signed and numbered.
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Diameter: 37 mm
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Signed: Patek Philippe