Swiss/French rock crystal open faced keyless watch Circa 1925

Rock crystal, platinum and diamond set dress watch
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A fine Swiss/French rock crystal, platinum and diamond set open faced keyless pocket watch made by Cartier in Paris and the European Watch and Clock Co. in Le Sentier, circa 1925. The nickelled movement with a lever escapement, 19 jewels and eight adjustments. Silvered, engine turned dial, the minute track with triangular five minute markers, skeletonized, diamond set Roman hour numerals and blued moon hands. A case of faceted rock crystal, and platinum band, pendant and bow. Dial signed Cartier, case numbered, movement signed European Watch and Clock Co. Swiss. Comes with the original presentation box.
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Diameter: 44 mm
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Signed: Cartier
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The European Watch and Clock Co. Inc. was established in the 1920s as a joint venture between Cartier and Edmund Jaeger of Jaeger-LeCoultre in Le Sentier, Switzerland.