American gold keyless lever split-seconds chronograph Circa 1910

Gold watch accompanied by document of history
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A very rare American, 18K yellow gold keyless pocket watch with split-second chronograph, circa 1910. Accompanied by a document copy of the history of the owner, his various businesses and the Benedict Brothers. Presented to Summer Ballard by William Dodsworth. The case with a split-second chronograph push-button at 11 o`clock, a hinged gold cuvette engraved: Summer Ballard a Token of Respect and Appreciation from William Dodsworth and his Sons, case back engraved with initials SB. White enamel dial with black radial Breguet numerals, outer 1/5th seconds track with five-second red Arabic markers, sunk subsidiary seconds dial at six and 30-minute register at 12 and blued steel spade hands. Superior Movement, 21 jewels, straight-line calibrated lever escapement, cut bimetallic compensation balance with Breguet balance spring, swan-neck micrometre regulator. Dial, case and movement signed.
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Diameter: 48 mm
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Signed: Benedict Brothers  New York