Case:Three-body, polished and brushed, screwed-down case back and crown, polished inclined bezel, Twinlock winding crown.Dial: satine silver with applied faceted steel baton indexes and luminous dots, subsidiary dials for the seconds, 12-hour, and 30-minute registers, outer minute/seconds divisions. Luminous steel baton hands.Movement: Cal. 722, rhodium-plated, 17 jewels, straight line lever escapement, monometallic balance adjusted to 3 positions, shock absorber, self-compensating Breguet balance spring, Microstella regulating screws.Dial, case and movement signed.Dial, case and movement in good conditionDiam: 36 mm x 13 mmNOTA: It is called “Pre-Daytona” by collectors; it was first published in the Rolex catalogue in 1964. This reference was available in stainless steel, 14K and 18K gold,