Description: A rare, very fine Ship's chronometer with 56h power reserve. The Union watch company only ever produced 37 marine chronometers, which all passed the tests of the German Naval Observatory in Hamburg. This instrument no. 20 was first tested in 1912/1913 and again later in 1916/1917. After the last test it was bought by Lidecke in Gestemuende. Case: mahogany box, brass inlays, applied signature shields, screwed on handles, with lid and glass, case key, brass gimbals and bowl, three-body. Dial: silvered, signed, numbered, inlaid radial Roman numerals, large auxiliary seconds, gilt spade hands. Movm.: brass movement, polished, decorated, rounded movement pillars, chain/fusee, spring detent escapement, blued screws, "Griesbach"-chronometer balance with 4 weights and 2 screws, blued helical balance spring, chatoned diamond endstone.
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