Swiss 18 carat gold half hunter lever pocket watch Circa 1870

A good Swiss 18 carat gold keyless wind half hunter pocket watch, circa 1870. Engine turned nickel finish Swiss lever movement, cut and compensated bimetallic balance. White enamel dial, black Roman numerals, black outer minute track, subsidiary seconds at 6 and blued steel spade hands. Polished hinged case, Roman numeral chapter to front, crest with deer to the back.
Dial and movement signed by retailer, case and movement signed by maker. Accompanied by a gilt chain.
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Diameter: 49 mm
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Signed: Patek Philippe – Spaulding & Co Chicago