Swiss 14 carat pink gold keyless pocket watch Circa 1926

Gold lever with gilt colour dial
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A Swiss 14 carat pink gold open faced keyless pocket watch, made by Zenith in Le Locle,  circa 1926. A polished case back with, in the center, an engraved monogram CM and a gilt metal cuvette. The case is made by Henri Jeanneret, Peseux. Gilded colour metallic dial, with suspended Arabic numerals, outer minute track, subsidiary at 6 and blued steel Lozenge hands. A gilded brass movement, going barrel,  gold screwed chatons, straight line lever escapement, cut bimetallic compensated balance with gold poising screws and blued steel hairspring with terminal curve, polished steel index regulator with swanneck spring and precision regulating device for fast/slow by means of an eccentric snail. Signature on the dial, case and movement.
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Diameter: 47 mm
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Weight: 74 g
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Signed: Zenith, Le Locle
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Accompanied by copies of the invention patents.
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The case and dial are slightly oxidized.