A stainless steel chronograph wristwatch with registers, Rolex, Oyster 'Cosmograph Daytona', ref.6265, circa 1979

nickel lever movement, 17 jewels, free-sprung mono-metallic compensation balance, adjusted to 3 positions, black dial, applied baton numerals, 3 silvered subsidiary dials calibrated in black indicating constant seconds and registers for 30-minute and 12-hour recording, steel calibrated bezel for units per hour, circular Oyster case with screw-down crown, case back and pushers, case, dial and movement signed, with stainless steel Rolex folding clasp