Swiss gold open faced keyless lever dress watch Circa 1960

Gold watch with two-tone silver dial
–
A Swiss 18K yellow gold open faced keyless dress watch, circa 1960. A Prince Imperial Rolex accompanied by a box. A solid, polished case, round bezel, snap-on case back. Two-tone silver dial with painted Arabic numerals and baton indexes, outer minute track, subsidiary seconds and blued steel baton hands. Rhodium-plated movement, 17 jewels, straight-line lever escapement with Rolex patent cap protecting escapement, monometallic balance with screws, self-compensating balance spring. Dial, case and movement signed.
–
Thickness: 7.5 mm
–
Diameter: 42 mm
–
Signed: Rolex  Swiss
–
The case is slightly worn and the dial is patinated and oxidized.