Fine and rare agate keyless Swiss pocket watch Circa 1935

Agate and gold filled Swiss keyless pocket watch
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A fine and rare Swiss agate and gold filled keyless pocket watch. Accompanied by the original Zenith fitted box. Made by Zenith Circa 1935.
The case is formed from a single piece of red agate with white bands, a gold filled polished bezel and a pendant.
White enamel dial with Paris numerals, outer minute track, subsidiary sunk seconds. Gilt Breguet hands.
Rhodium-plated movement with damascened in a geometrical pattern, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring and a cam-type patented regulator.
Dial and movement signed.
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Diameter: 50 mm
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Signed: Zenith