Swiss 18K gold open faced complicated lever watch Circa 1918

Gold complicated chronograph Patek Philippe
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A Swiss 18 carat gold open faced minute repeating split-seconds chronograph lever pocket watch with perpetual calendar and moon phases, circa 1918. Sold on August 21, 1922. Lever movement, 35 jewels. Silvered dial with Roman hours and Arabic minutes, subsidiary dials for the days of the week, months, moon phases and constant seconds combined with the date. Plain case, concealed hinged back. Dial and cuvette signed, case and movement signed and numbered. Comes with an Extract from the Archives, three leather cases and a pouch.
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Diameter: 54 mm
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Signed: Patek, Philippe & Co Geneva
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This watch is an exceptional example of an early 20th-century Grand Complication watch from Patek Philippe. It features three important complications: the perpetual calendar for astronomical functions, the split-seconds chronograph for timing two events at once and a fine minute repeating complication that chimes the hours and minutes, activated from a slide at the case band.