Vehicle details
| Registration | OWO306M |
| Fleet no | RC474 |
| Date new | 5/74 |
| Chassis | RELH-4 Series 2 |
| Wheelbase (feet - ins) | 18-6 |
| Chassis no | 4-667 |
| Body manufacturer | ECW |
| Style | Series 2 coach |
| Seats | 47 |
| Body no | 21464 |
| Engine | Leyland 680 |
| Cylinders (no) | 6 |
| Engine capacity | 11.1 litre |
| Depot (Period 8-1975) | Cardiff (Gelligaer Street) |
| Fleet no 1975 | RC2374 |
| Fleet no 1983 | RD1139 |
| NBC livery date | Delivered |
| Withdrawn | After 7/84 |
| Notes |