Swiss silver-niëllo hunting cased pocket watch Circa 1925

Motoring and Aviation watch by Longines
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A Swiss silver-niëllo, gold and damascened hunting cased keyless pocket watch, circa 1925. The decoration by Huguenin. The front cover is decorated with a gold damascened flying boat in a niello river landscape, and a flat nielloed band and the back cover is decorated with a nielloed scene of an early racing car on a track with a stadium behind. Hinged silver cuvette engraved with the prize medals. White enamel dial with Breguet numerals, outer minute track, subsidiary seconds and blued steel Breguet hands. A rhodium-plated movement, Geneva striping decoration, 15 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, and an index regulator. Dial, cuvette and movement signed, case signed Huguenin.
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Diameter: 47 mm
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Signed: Longines  Swiss
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The case is slightly chipped and the movement is slightly damaged.