ROLEX Ref 2916 Steel chronograph watch, round case, black patinated 2-counter dial with Arabic numerals, minute track, tachometric and telemetric scales, 30-minute chrono totalizer. Stylized stepped bezel and lugs. Olive-shaped push-buttons for chrono, attached crown. Mechanical movement with column wheel. Leather strap with gilded metal buckle. Dial, movement back and case back signed. Case back numbered 031638. Circa 1930. (scratches, wear to the dial, accident on a handle detached from the case, expect a complete watchmaking overhaul). Diameter: 33.5 mm.