Swiss stainless steel open faced lever pocket watch Circa 1932

Stainless steel lever watch by Patek Philippe & Co.
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A fine and rare Swiss stainless steel Staybrite keyless open faced dress watch circa 1932.
Gilt brass movement, calibre 7,5,  straight-line lever escapement, a moustache, cut bimetallic compensation balance, 18 jewels, blued steel Breguet balance spring, index regulator. Silvered, partly patinated dial with Roman numerals, outer minute divisions, subsidiary seconds, and original hands. Plain stainless steel case. Dial, case and movement signed.
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Diameter: 46 mm
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Signed: Patek Philippe & Cie. Genève