Very fine Swiss gem set Art Deco brooch watch Circa 1920

Platinum and multi gem set Art Deco lever lapel watch
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A very fine and attractive French platinum and multi gem set Art Deco keyless lapel watch, circa 1920. Oval shaped nickel finished jewelled lever movement. Silvered matte dial with Arabic numerals. Rectangular shaped case set with a carved emerald depicting a bird, diamond set and black enamel border, black onyx, carved emerald, ruby and diamond set branch, openwork diamond, black onyx, emerald and carved ruby foliate brooch. Case with hand stamped number 91’836.
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Width: 18 mm
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Lenght: 84 mm
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Signed: No name