Swiss white gold and osmium lever dress watch Circa 1926

Dress watch with jumping and wandering hour by Breguet
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A fine and very rare Swiss 18 carat white gold and osmium open faced keyless lever dress watch with jumping and wandering hour, circa 1926. Sold on 25 August 1926 to Jean Dollfus. Nickel finished lever movement, 19 jewels, bimetallic compensation balance. Two-tone silvered matte dial with outer Arabic minute ring, wandering central disc with engine turned arrow and aperture for the jumping Arabic hours. Plain Cubist case, snap on back. Case and movement numbered, dial signed. Comes with original Breguet green morocco box.
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Diameter: 43 mm
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Signed: Breguet No 1285 – montre à cadran tournant portant les heures sautantes dans un guichet