Swiss 18K gold keyless pocket watch with power reserve Circa 1912

Gold watch with engraved coat of arms
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A Swiss 18 carat gold keyless pocket watch with power reserve, circa 1912. A polished case, snap on case back with engraved coat of arms over glassed inner back. White enamel dial with black radial Roman numerals, outer minute track. Sunk subsidiary seconds, power reserve sector below 12 and blued steel spade hands. Movement with Geneva striping decoration, wolf’s tooth winding geared to an extra wheel operating the power reserve indicator, 19 jewels, straight line lever escapement, cut bimetallic compensation balance with blued steel Breguet balance spring, Wilmot’s patented micrometric cam regulator. The case is made by Frodsham London, the dial and movement are signed.
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Diameter: 54 mm
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Signed: Patek, Philippe & Cie.  Genève