Swiss silver lever deck watch made for military use, circa 1943

Silver open faced keyless lever by Ulysse Nardin
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A very fine Swiss silver open faced keyless lever deck and pocket chronometer made for military use, circa 1943. Frosted gilt movement, 21 jewels, straight-line lever escapement, anibal-brass Guillaume balance with 8 adjustments, blued steel Breguet balance spring with terminal curve, swan neck micrometer regulator. Hinged silver cuvette. Matte silver dial with champlevé Roman numerals, outer minute track, subsidiary seconds and original blued steel spade hands. Polished case. Dial, case and movement signed, case numbered.
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Diameter: 59 mm
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Signed: Chronomètre Ulysse Nardin Locle Suisse