Swiss 18K gold open faced complicated lever watch Circa 1917

Gold repeating perpetual calendar with moon phases by Patek Philippe
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A Swiss 18 carat gold open faced minute repeating lever pocket watch with perpetual calendar and moon phases, circa 1917. Retailed by Bailey, Banks & Biddle Co. Sold on January 7th, 1925. Lever movement, 31 jewels. White enamel dial with Breguet hours and outer minute divisions, subsidiary dials for the days of the week, months, moon phases and constant seconds combined with the date. Plain case, concealed hinged back with crest. Dial signed by the watchmaker, case and movement numbered and also signed by the watchmaker, cuvette signed by the watchmaker and retailer. Comes with an Extract from the Archives.
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Diameter: 54 mm
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Signed: Patek Philippe Genève Switzerland
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The movement of this piece was completed in 1917, towards the end of the First World War. Despite the international turmoil, Patek Philippe was creating some of the finest complicated pocket watches known. Indeed, celebrated collectors James Ward Packard and Henry Graves, Jr., were actively collecting at this time, constantly spurring Patek Philippe to greater technical achievements. Six watches from the 174000-174999 production range, to which the present lot belongs, were commissioned by these distinguished collectors.