Swiss 18k gold open faced minute repeating lever Circa 1915

Gold minute repeater by Patek Philippe
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A fine Swiss 18 carat gold open faced minute repeating keyless lever watch, circa 1915. Retailed by Max Schnabel, Madrid. Nickel finished lever movement, 29 jewels, bimetallic compensation balance, repeating on two hammers onto two gongs, wolf’s tooth winding. Engraved gold cuvette. White enamel dial with Breguet numerals, outer railway five minute divisions and subsidiary seconds. Plain case, repeating slide in band. Case, dial and movement signed by watchmaker, cuvette signed by watchmaker and retailer, case and movement numbered.