Patek Philippe. A fine and rare stainless steel openface keyless lever watch with two-tone silvered sector dial

Patek Philippe. A fine and rare stainless steel openface keyless lever watch with two-tone silvered sector dial
Signed Patek Philippe & Cie., Genève, movement no. 816'793, case no. 610'172, manufactured in 1927
Cal. 17''' nickel-finished lever movement stamped twice with the Geneva seal, 18 jewels, bimetallic compensation balance, wolf's tooth winding, two-tone silvered sector dial, black hard enamel baton numerals, engine-turned subsidiary seconds, plain circular case, snap on back, engraved foliage decorated bow, case, dial and movement signed
46 mm. diam.