| Present Location | Colne Valley |
| County Location | Essex |
| Designed For | BR |
| Built by | Pressed Steel |
| Diagram number | 512 |
| Lot number | 30518 |
| Type | DMBS |
| First Number | 55033 |
| Later Numbers | W55033 |
| Present Number | W55033 |
| Current Livery | BR multiple unit green livery |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Class 121 (single car) - identical to Class 117 except for extra cab at other end. Originally part of B133 - i.e. Bristol set 133. Last train on Bridport Branch, 13/09/66. P 1995, at Colne Valley except when to East Kent Railway winter 1996-7. |
| Owner | Pressed Steel Heritage Ltd |
| External Structural Condition | Very Good |
| Internal Structural Condition | Very Good |
| Underframe Condition | Very Good |
| External Finish | Very Good |
| Internal Finish | Very Good |
| Degree of External Originality | As built/last Passenger rebuild (BR or before) |
| Degree of Internal Originality | As built/last Passenger rebuild (BR or before) |
| Degree of Underframe/Running Gear Originality | As built/last Passenger rebuild (BR or before) |
| Degree of External Authenticity | Very Good |
| Degree of Internal Authenticity | Very Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Few |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | Yes |
| Survey Date | 29/08/2009 |
| Surveyor | Kevin Stroud |
| Photo Date | 28/08/2013 |
| Photo by | Steve West |
| At Risk | No |
| Date Record Last Updated | 11/12/2019 |
