Swiss minute repeating perpetual calendar watch Circa 1915

Gold repeating perpetual calendar watch with moon phases by Patek Philippe
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A fine and rare, minute repeating keyless-winding Swiss gold pocket watch with five horological complications, circa 1915.
Round-shaped, 18K yellow gold, custom-made three-piece polished case with screwed bezels. White enamel dial with revolving radial Dauphine numerals, blued steel Spade hands, subsidiary seconds at 6, and five horological complications: Instantaneous perpetual calendar; Date of the month (subsidiary dial at 6 o’clock); Day of the week (subsidiary dial at 9 o’clock; indications given in English); Month of the year (subsidiary dial at 3 o’clock; indications given in English); Age and phases of the moon (subsidiary dial, graduated from 0 to 29 ½ and aperture at 12 o’clock).
Rhodium-plated movement with going barrel, straight-line equilibrated lever escapement, cut bimetallic compensated balance with gold and platinum poising screws and blued steel hairspring with a terminal curve, index regulator with swanneck spring and micrometric screw, and eight adjustments. Dial, case and movement signed.
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Diameter: 53 mm
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Signed: Patek, Philippe & Co Geneva, Switzerland
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The case of this watch was probably replaced relatively early in its life, possibly due to the damaged original. Many watches of this type were sold in America, and the original owner probably thought it too difficult or costly to return the watch to Switzerland for a new case. The screwed bezels of the present case also attest to their American origin.