Swiss yellow gold open faced dress pocket watch Circa 1927

Gold watch made for Tiffany & Co.
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An elegant Swiss 18 carat yellow gold keyless dress pocket watch, circa 1927.
A polished and brushed case. Brushed silver dial with applied yellow gold Breguet numerals, outer dot minute divisions, subsidiary seconds dial and yellow gold Breguet hands. Rhodium plated movement, Geneva striping decoration, 18 jewels, straight line lever escapement, cut bimetallic compensation balance to eight adjustments, blued steel Breguet balance spring, index regulator. Dial signed Tiffany & Co, case and movement signed Patek Philippe made for Tiffany.
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Diameter: 45 mm
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Signed: Patek Philippe / Tiffany & Co.  Genève