French 18K gold tonneau shaped Art Deco dress watch Circa 1925

Gold and enamel keyless lever watch
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A fine French 18 carat gold and enamel open faced tonneau shaped keyless lever Art Deco pocket watch, circa 1925-1930. Gilt Chronomètre Alti movement, 15 jewels, a straight line lever escapement, cut bimetallic balance and Breguet balance spring.
A solid case, the back engine turned in a geometrical pattern centred by polychrome enamel floral decoration, bezels and bow cast and engraved. Silvered dial in Cartier style with black painted Arabic numerals, an outer minute track, subsidiary seconds at 6 o’clock and blued steel spade hands.
Dial inscribed Chronomètre Alti.
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Dimensions: 41 x 52 mm
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Weight: 61 g
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Signed: No name