French gold and steel Art Deco pendant watch Circa 1920-1939

Pendant watch with open-face by Cartier
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A fine, vintage Art Deco ladies’ pendant watch in steel and gold, circa 1920-1939.
Very fine Cartier precision lever movement calibre 21, Geneva stripes, seventeen jewels, adjustments six positions, movement number 8410. Polished plain 18K gold and steel case, case number 200302, base and crown set with a sapphire. Particularly nice dial in the style of Art Deco with Roman radial hours, outer minutes track, and blued steel hands. Dial and movement signed.
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Diameter: 31 mm
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Signed: Cartier Paris