Rare Swiss stainless steel open faced lever watch Circa 1929

Stainless steel keyless pocket watch
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A rare Swiss stainless steel open faced keyless pocket watch made by Patek Philippe in Geneva, circa 1929. Bridge movement with a club tooth lever escapement and gold screw compensation balance. Two tone silvered sector dial with inner baton hour markers, outer minute divisions, an outermost fifth of a second track with Arabic five minute numerals and blued steel hands. The plain case with a push back. Dial signed, case and movement signed and numbered. Comes with the original presentation box.
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Diameter: 46 mm
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Weight: 56 g
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Signed: Patek, Philippe & Cie Genève
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Sector dials were considered the most attractive and elegant dials of their time.