Swiss platinum keyless open faced lever watch Circa 1935

Platinum pocket watch 
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A Swiss platinum open faced manual wind pocket watch made by Patek Philippe in Geneva, circa 1935. The movement features 18 jewels and a lever escapement. It has a signed silver dial with applied platinum bullet form hour indexes, outer dot minute divisions, subsidiary seconds at 6 and dauphine hands. The platinum case includes a snap-back. Case, dial, and movement are all signed.
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Diameter: 43 mm
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Weight: 53.2 g
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Signed: Patek, Philippe & Cie Genève Fab. Suisse