Fine German marine chronometer with power reserve Circa 1940

56-Hour power reserve deck watch by GUB
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A German marine chronometer with power reserve indication, circa 1940. Mechanical calibre. Silvered dial with Roman hours and outer minute divisions, subsidiary seconds, 56-hour power reserve. Mahogany box, brass case. Box, dial and movement signed, case signed and numbered.
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Dimensions box: 18.5 x 18 x 19 cm
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Signed: GUB Veb Glashütter Uhrenbetriebe
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Developed in the 18th century the marine chronometer was a crucial tool to accurately measure time over a long sea voyage and was a major technical achievement then. Made approximately around the World War II period.