Swiss agate and gold filled open faced lever watch Circa 1935

Agate gold filled pocket watch by Zenith
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Fine and rare Swiss agate and gold filled keyless pocket watch, circa 1935.
Rhodium-plated movement, damascened in a geometrical pattern, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring and cam-type patented regulator. White enamel dial with fancy Arabic numerals, outer minute track and Arabic 24-hour numerals, sunken centre and subsidiary sunk seconds, original black Breguet hands. Case formed from a single piece of black agate with white bands, gold filled reeded bezel and pendant. Dial, case and movement signed. Accompanied by the original box.
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Diameter: 51 mm
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Signed: Zenith Swiss