Swiss steel deck chronometer with power reserve Circa 1943

Open faced Ankerchronometer by Ulysse Nardin
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A very fine Swiss Ulysse Nardin deck watch chronometer with 40h power reserve indicator for the navy, circa 1943.
Stainless steel plain case with screwed back. Gilt Ankerchronometer movement with Guillaume chronometer balance and fine adjusting device. Signed and numbered enamel dial with radial Roman hours, subsidiary dial for the seconds, subsidiary dial for the power reserve indication and blued steel spade hands.
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Diameter: 64 mm
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Weight: 214 g
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Signed: Ulysse Nardin Locle Suisse