German silvered and chromed Glashütte lever deck watch Circa 1917

Heavy Glashütte deck watch by Julius Assmann
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An extraordinary Glashütte marine observation watch with original box and original papers, circa 1917.
Signed and numbered precision lever movement with a gold escape wheel. Signed enamel dial with Roman radial hours, outer minutes track, subsidiary dial for the seconds, and blued steel hands. Unusual, chrome-plated/silver-plated metal, engine-turned case, screwed, and with factory glazing. An original box labelled Assmann Marine Uhr and with original replacement glass. Original papers with matching numbers.
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Diameter: 56 mm
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Weight: 119 g
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Signed: Julius Assmann Glashütte I/Sachsen
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Very rare wartime B-Uhr. Usually, the Assmann marine watches had solid silver cases.