Swiss platinum full hunter “extra flat” watch Circa 1920

“Extra flat” pocket watch with lever escapement
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A pocket watch with a very rare platinum “extra flat” full hunter case watch, made by Audemars Piguet & Cie in le Brassus, Genève, Switzerland, circa 1920. The watch features a numbered, extremely thin, full hunter case which is crafted from platinum. The silvered dial features an outer minute and hour track with Arabic hour numerals and blued Breguet steel hands. The movement is equipped with an extremely thin precision lever escapement and Geneva striping decoration.
The dial is signed.
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Diameter: 45 mm
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Thick: 5 mm
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Weight: 52 g
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Signed: Audemars, Piguet Genève