Elegant Swiss platinum Art Deco dress watch Circa 1920

Gold open faced lever pocket watch 
–
A very fine and rare Swiss, thin and elegant, keyless platinum Art Deco dress watch, circa 1920. A solid, polished case, rounded band, stepped bezel, case back with initials SSK and dedication inside, decorative bow. Matte silver dial with painted radial Roman numerals, outer minute track, subsidiary seconds dial. Blued steel Breguet hands.
A rhodium-plated movement, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance adjusted to eight positions, blued steel flat balance spring, index regulator. Dial, case and movement signed.
–
Diameter: 43 mm
–
Signed: Vacheron & Constantin  Genève
–
The dial is oxidized.