Swiss 18 carat gold U.S. twenty dollar coin watch Circa 1974

Gold coin watch
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A fine and ultra rare Swiss 18 carat gold manual wind concealed watch set into a U.S. 20 dollar coin made by Patek Philippe in Geneva, circa 1974. The movement with a lever escapement and 18 jewels. Nicely aged champagne coloured dial with Roman hour numerals and blued hands. The case with a snap on back, hinged within a 1923 United States of America 20 dollar coin featuring Lady of Liberty on the front and the bald eagle on the reverse, revealed by pressing the thumbpiece in the milled band. Dial, case and movement signed, case and movement numbered. Comes with an Extract from the Archives confirming the date of sale on December 20th, 1976.
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Diameter: 35.5 mm
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Signed: Patek Philippe Genève
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Reference 800.
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Patek Philippe produced several variants of coin watches using different coins and monetary values, including reference 800 in a U.S. 5 dollar coin, reference 801 in a U.S. 10 dollar coin, reference 802/803 in a U.S. 20 dollar coin, reference 800 in a 100 Swiss franc coin and reference 805 in a 50 Pesos coin.