Swiss 18K gold repeating astronomical dress watch Circa 1965

Gold lever with perpetual calendar and moon phases
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A very fine Swiss 18 carat yellow gold open faced minute repeating astronomical keyless lever dress watch with digital American perpetual calendar and moon phases, circa 1965. Made by Patek Philippe & Co. in Genève, Switzerland and retailed by Asprey in London, England. Accompanied by the Certificate of Origin. The movement of this timepiece was made in 1947, it was further completed in 1965, cased in 1970 and sold on August 15th, 1973.

Matte silver dial with applied yellow gold baton hour indexes, outer minute divisions, an aperture at 12 o’clock for the linear calendar indicating the days of the week, the months of the year and the date, subsidiary seconds with concentric moon phases at 6 and yellow gold dauphine hands.

The rhodium plated movement with Geneva striping decoration, 29 jewels, a counterpoised straight line lever escapement, monometallic balance adjusted to heat, cold, isochronism and five positions, a Breguet self compensating balance spring with swan neck micrometre regulator and repeating on gongs activated by a slide in the band. Dial signed by the watchmaker and retailer, case and movement signed by the watchmaker.
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Diameter: 51 mm
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Signed: Patek Philippe Genève – Asprey
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The linear digital calendar or so-called American (perpetual) calendar is a calendar in which the date is displayed in a single linear aperture, allowing for a legible dial to be read at a glance. This type of display was invented in the early Art Deco period and is most often found in watches destined for the Anglo-American market. This kind of calendar became popular once again after the Second World War.