A stainless steel chronograph wristwatch with registers and bracelet, Rolex, Oyster 'Cosmograph Daytona', ref.6263, circa 1978

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