Swiss stainless steel, rose gold open faced lever Circa 1940

Lever with two tone silvered roulette style dial by Patek Philippe
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A fine and unusual Swiss stainless steel and rose gold open faced keyless lever watch, circa 1940. Nickel finished lever movement stamped twice with the Geneva seal, 17 jewels, bimetallic compensation balance, micrometer regulator. Two tone silvered roulette style dial, applied rose gold baton and Arabic numerals, engine turned subsidiary seconds. Plain stainless steel case, rose gold rim to the bezel and snap on back. Case, dial and movement signed.
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Diameter: 44 mm
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Signed: Patek, Philippe & Cie Genève