| Present Location | Welsh Highland Heritage Railway, Porthmadog |
| County Location | Gwynedd |
| Designed For | GWR |
| Build Location | Swindon |
| Built by | GWR |
| Lot number | 1617 |
| Type | BY |
| First Number | 136 |
| Later Numbers | 2 |
| Present Number | 136 |
| Gauge | 1ft 11 5/8in |
| Wheel Arrangement | 4 wheel |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Built for Vale of Rheidol (new build - not as previously reported on to existing underframe). Steel underframe. Sold by BR to WHR, where in use from 08/80. Since rebuilt by WHR with ply and mouldings; converted to air brakes. See also 137 (Vale of Rheidol Railway). |
| Owner | Welsh Highland Railway Limited |
| External Structural Condition | Good |
| Internal Structural Condition | Good |
| Underframe Condition | Good |
| External Finish | Good |
| Internal Finish | Satisfactory |
| Degree of External Originality | Much replaced/reproduced material |
| Degree of Internal Originality | Some replaced/reproduced material |
| Degree of Underframe/Running Gear Originality | Some replaced/reproduced material |
| Degree of External Authenticity | Fair |
| Degree of Internal Authenticity | Very Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Unique |
| Historical Importance | Some Importance |
| Storage | Secure Building |
| Operating | Yes |
| Survey Date | 30/01/2000 |
| Surveyor | Michael Cope |
| Photo Date | 24/09/2011 |
| Photo by | Michael Cope |
| At Risk | No |
| Date Record Last Updated | 12/09/2023 |
