Swiss gold open faced min repeating chronograph Circa 1901

Gold open faced minute repeating lever by Patek Philippe
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A fine Swiss 18 carat gold open faced minute repeating chronograph keyless lever watch, circa 1901. Mechanical jewelled lever movement, repeating on two hammers onto two gongs, activated through a slide in the band. Engraved gold cuvette. White enamel dial with Breguet numerals, outer red Arabic five minute divisions, two subsidiary dials for 30 minutes register and constant seconds.  Engraved case, chronograph button in the crown. Case, cuvette, dial and movement signed.
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie Genève