Swiss Observatory Chronometer with lever escapement Circa 1930

Pocket watch 1 of only 24 examples produced
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An extremely rare Observatory Chronometer, one of only 24 items produced by Longines in Saint Imier, Switzerland, circa 1930. The open faced case of this watch is glazed on both sides and its white enamel dial has Arabic hour numerals, a subsidiary seconds dial at 6 o’clock and blued steel hands. The numbered observatory movement has a lever escapement a chronometer balance, a fine adjusting device and screwed chatons.
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Diameter: 68 mm
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Weight: 251 g
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Signed: No name
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The item presented here is one of only 24 examples produced with this Observatory calibre and was triple tested at the Neuchâtel Observatory.