Fine and rare Swiss gold open faced keyless watch Circa 1966

Gold open faced keyless watch by Patek Philippe
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A fine and rare Swiss yellow gold open faced keyless watch made for the american market, circa 1966.
Manual winding jewelled nickel lever movement, stamped with the seal of Geneva.
Silvered dial, black Roman numerals, subsidiary seconds, 18k yellow gold case, snap-on back, high-arched bow made by Eggli & Cie, case, dial and movement signed.
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Diameter: 47.5 mm
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Signed: Patek Philippe Genève
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With an Extract from the Archives confirming sale in 1966 and a presentation case.