Vehicle details
| Registration | HAX305L |
| Fleet no | RD173J |
| Date new | 4/73 |
| Chassis | RELH-4 Series 2 |
| Wheelbase (feet - ins) | 18-6 |
| Chassis no | 4-562 |
| Body manufacturer | ECW |
| Style | Series 2 RELH Dual purpose BET curved windscreen |
| Seats | 47 |
| Body no | 20334 |
| Engine | Gardner 6HLX |
| Cylinders (no) | 6 |
| Engine capacity | 10.45 litre |
| Depot (Period 8-1975) | Aberbeeg (Jones) |
| Fleet no 1975 | RD673 |
| Fleet no 1983 | |
| NBC livery date | Delivered |
| Withdrawn | |
| Notes |