Swiss platinum repeating Art Nouveau dress watch Circa 1916

Platinum, gold and enamel dress watch
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A very fine and rare Swiss, thin, keyless, minute repeating, Art Nouveau 18K yellow gold, platinum and enamel dress watch with a diamond-set winding crown, circa 1916. Polished, solid case, case back with blue enamel and yellow gold monogram, inside engraved with a dedication dated 1916, winding crown set with a large faceted diamond. Guilloché silver dial with applied yellow gold Arabic numerals on a plain outer reserve, sunk subsidiary seconds dial. Yellow gold Breguet hands.
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A nickel-silver movement, Geneva striping decoration, 29 jewels, straight-line counterpoised lever escapement, cut bimetallic compensation balance with eight adjustments, blued steel Breguet balance spring, repeating on gongs via activating slide on the band. Dial, case and movement signed.
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie  Genève