Swiss 18K yellow gold keyless lever pocket watch Circa 1913

Gold open faced lever pocket watch 
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A very fine Swiss, large, 18K yellow gold, keyless pocket watch, circa 1913. A polished case, case back featuring engraved monogram JE, hinged gold cuvette. White enamel dial with Arabic numerals, outer minute track with baton indexes, subsidiary seconds. Gold spade hands. A gilt brass movement, wolf’s tooth winding, straight-line moustache lever escapement, blued steel Breguet balance spring, index regulator. Dial, case, cuvette and movement signed.
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Diameter: 54 mm
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Signed: Patek, Philippe & Cie.  Genève
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The case is repolished, the dial is chipped under the bezel, not visible when closed.