| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Rolex Daytona - Original series |  |  |  |  |  |  |
| 3 | Years | Reference | Calibre | VPH | Bezel | Oyster | Notes/Features |
| 4 | 1963–69 | 6239 | 722, 722-1 | 18,000 | Engraved (stainless steel) | No No | Earliest model carries extra tachymeter engraving at 275 units/hr. |
| 5 | 1965–69 | 6240 | 722, 722-1 | 18,000 | Black (acrylic inlay) | Yes Yes | First appearance of optional metallic dial finish. |
| 6 | 1965–69 | 6241 | 722, 722-1 | 18,000 | Black (acrylic inlay) | No No | All variants include "Daytona" printed on dial. |
| 7 | 1970 | 6262 | 727 | 21,600 | Engraved (stainless steel) | No No | Produced for one year only. |
| 8 | 1971–88 | 6263 | 727 | 21,600 | Black (acrylic inlay) | Yes Yes | - |
| 9 | 1970–72 | 6264 | 727 | 21,600 | Black (acrylic inlay) | No No | - |
| 10 | 1971–88 | 6265 | 727 | 21,600 | Engraved (stainless steel) | Yes Yes | - |

Question: What was the successor of the Rolex Daytona 6239, and what were some of the improvements over the predecessor?
Answer: Rolex Daytona´s 6239 were succeeded by the 6241, which replaced the engraved stainless steel bezel with a black acrylic bezel.