Vehicle details
| Registration | GWO6D |
| Fleet no | RC666 |
| Date new | 2/66 |
| Chassis | RELH Series 1 |
| Wheelbase (feet - ins) | 19-0 |
| Chassis no | 232.020 |
| Body manufacturer | ECW |
| Style | Series 1 coach |
| Seats | 47 |
| Body no | 15915 |
| Engine | Gardner 6HLX |
| Cylinders (no) | 6 |
| Engine capacity | 10.45 litre |
| Depot (Period 8-1975) | Cardiff (Gelligaer Street) |
| Fleet no 1975 | RC7666 |
| Fleet no 1983 | |
| NBC livery date | 3/73 |
| Withdrawn | 1979 |
| Notes |