Swiss yellow gold and enamel keyless watch Circa 1865

Gold, enamel and diamond set cylinder watch by Patek
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A Swiss yellow gold and enamel hunting cased keyless watch, made in 1865. Manual winding.
18k yellow gold, engraved hinged case band and back with blue enamel pattern, hinged cuvette. Cuvette signed, case numbered.
White enamel dial with Roman numerals and filigree Breguet hands. Cuvette signed, case numbered.
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Diameter: 37 mm
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Signed: Patek Philippe
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Patek Philippe Extract from the Archives confirming production of the present watch with enamel dial in 1865 and its subsequent sale in 1966.