Swiss gold and platinum open faced lever watch Circa 1923

Gold and platinum lever watch by Patek Philippe
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A Swiss 18 carat gold and platinum open faced lever pocket watch, circa 1923. Sold on 5 August 1925. Lever movement, 18 jewels. Silvered dial with Arabic hours and outer minute dots, subsidiary seconds. Chiselled engraved bezel and border on the case back with eight crosses in platinum. Case, dial and movement signed, case and movement numbered. Comes with an Extract from the Archives confirming the production of this watch in 1923.
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Diameter: 45 mm
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Signed: Patek, Philippe & Cie Geneva Switzerland