Fine Swiss 18K yellow gold open faced keyless lever Circa 1980

Gold lever by Patek Philippe
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A fine Swiss 18 carat yellow gold manual winding open faced keyless lever watch, circa 1980. This watch features a signed mechanical cal. 1-17/45 movement, adjusted to five positions, with micrometric adjustment, lever escapement, and a Geneva hallmark. The signed opaline dial showcases applied Breguet style Arabic numerals, a small seconds hand, a pearled minute track, and Breguet style hands. It boasts an 18 carat yellow gold round case.
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Diameter: 44 mm
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Weight: 65 g
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Signed: Patek Philippe Genève
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The watch is generally in good condition. There are very few signs of use, including natural ageing of the gold on the band. The dial is also in good condition, and the movement is ticking. Slight oxidation is visible on the case.