Swiss stainless steel open faced lever watch Circa 1937

Stainless steel pocket watch
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A rare Swiss stainless steel open faced keyless pocket watch made by Patek Philippe in Geneva, circa 1937. Nickel finished lever movement stamped twice with the Geneva seal, 18 jewels. Matte silvered dial with applied Breguet numerals, outer dot minute divisions, subsidiary seconds at 6 o’clock and leaf hands. The plain case with a snap on back. Case, dial and movement signed.
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie Genève