Swiss stainless steel open faced lever pocket watch Circa 1930

Stainless steel lever watch by Patek Philippe
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An extremely rare Swiss stainless steel open faced lever pocket watch, circa 1930. Gilt lever movement, moustache lever, wolf’s toothing, fine adjusting device, two Geneva punches. Silvered, partly patinated dial with Roman numerals and outer minute divisions, subsidiary seconds, and original hands. Plain case. Dial signed, movement signed and numbered, case numbered. Comes with an extract from the archives.
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie Genève Fab Suisse