Swiss 18 carat gold oval open faced lever watch Circa 1913

Gold oval keyless lever watch by Patek Philippe
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A rare and unusual Swiss 18 carat gold oval open faced keyless lever watch, circa 1913. Retailed by Schreve, Crump & Low Co, Boston. Keyless lever movement, 18 jewels. Engine turned silvered dial with Breguet numerals on blank outer ring and subsidiary seconds. Plain oval case, snap on back with engraved initials CF to a central lozenge. Case, dial and movement signed, movement also signed by retailer.
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Width: 51 mm
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Signed: Patek, Philippe & Co Geneva-Switzerland