Early Swiss 18K gold seconde morte precision watch Circa 1860

Gold lever pocket watch by Dubois & LeRoy
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An early Swiss 18-carat gold open faced seconde morte lever precision watch, circa 1860. Fine lever movement, 22 jewels, two barrels for the movement and independent jumping seconds. White enamel dial with Roman hours and Arabic five minutes, independent centre seconds, stoppable by a lateral slider, fine rose gold hands. Plain case. Cuvette signed and numbered, case and movement numbered.
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Diameter: 50 mm
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Weight: 102 g
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Signed: DuBois & LeRoy Le Locle Suisse