French gold, enamel, rock crystal lever dress watch Circa 1925

Unusual open faced keyless lever by Cartier
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A fine and unusual French 18 carat gold, enamel and rock crystal open faced keyless lever dress watch, circa 1925. Mechanical movement, 18 jewels. Engine turned two-tone silvered dial with Arabic five minute divisions and blued steel moon style hands. Rock crystal case, gold and white enamel chapter ring with gold Roman numerals, florette spacers, triangular bow, all secured by four screws. Dial and movement signed.
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Diameter: 50 mm
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Signed: Cartier