American 18K yellow gold hunting cased pocket watch Circa 1861

Gold keyless lever by E. Howard & Co.
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An American 18K yellow gold hunting cased keyless pocket watch, circa 1861. Accompanied by an associated key. Florally engraved case, engine turned rimmed. White enamel dial with painted radial Roman numerals, an outer minute ring and sunk subsidiary seconds dial. Blued steel crescent hands. A nickel movement, 3/4 plate, 15 jewels, most in raised screwed gold settings, straight-line calibrated lever escapement, cut bimetallic compensation balance with gold screws, blued steel flat balance spring, swan neck micrometric regulator. Dial and movement signed, case signed CEM&Co.
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Diameter: 57 mm
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Signed: E. Howard & Co.  Boston