| Maker | Hunslet Engine Company |
| Year | 1950 |
| Works number | 4136 |
| Wheel arrangement | 0-4-0 |
| Wheel diameter | 24″ |
| Wheelbase | 4′ 3″ |
| Engine | Gardner 4LW |
| Transmission | 2-speed mechanical transmission, jackshaft drive |
| Power | 75 bhp at 1700 rpm |
| Weight | 10 tons |
| Livery | Unlined Deep Bronze-Green |
| Notes | Incorporates parts of another loco, stored at Brynglas |
