Swiss brass deck watch with power reserve indication Circa 1920

Brass deck watch in a mahogany box
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A very fine Swiss, 8 day going keyless deck lever chronometer with power reserve indication, circa 1920. Brass bowl with threaded glazed bezel, weighted back, gimballed in a two tier mahogany box, gimbal ring lock at the side. Matte silvered dial, champlevé upright Paris numerals, outer minute track, subsidiary seconds dial at 6 o’clock, power reserve indicator below 12 o’clock. Blued steel Spade hands. A frosted gilt movement, half plate, five wheel train, 19 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring and patented micrometric cam type regulator. Dial, movement and box signed.
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Diameter: 65 mm
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Signed: Longines  Swiss