| Present Location | Bluebell |
| County Location | West Sussex |
| Designed For | SR |
| Build Location | Eastleigh |
| Diagram number | 2105 |
| Lot number | 498 |
| Type | BTK |
| First Number | 3687 |
| Later Numbers | S3687S, DS70160, 083409 |
| Present Number | None |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Underwent Departmental conversion to instructional coach in 1962. 29T. P 1991. Under active restoration, notably for exterior panelling and interior structure. Hastings gauge, so will be "three abreast" seating. By 08/04 external panelling complete, internal gangways being fitted. 07/19: restoration progressing at pace now. 05/22: work continues, glazing on the East side now complete. 06/23: one of bogies from dismantled underframe of SR 4036 (qv) is being overhauled for use in the retoration of this vehicle. 10/23: overhaul of the bogies, including re-bushing most of the brake gear, is nearly completed |
| Owner | Bluebell Railway |
| External Structural Condition | Good |
| Internal Structural Condition | Poor and Incomplete |
| Underframe Condition | Good |
| External Finish | Poor and Incomplete |
| Internal Finish | Derelict/Not Present |
| Degree of External Originality | Some replaced/reproduced material |
| Degree of Internal Originality | Much replaced/reproduced material |
| Degree of Underframe/Running Gear Originality | Some replaced/reproduced material |
| Degree of External Authenticity | Good |
| Degree of Internal Authenticity | Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Few |
| Historical Importance | Some Importance |
| Storage | Secure Building |
| Operating | No |
| Survey Date | 25/08/2004 |
| Surveyor | Kevin Stroud |
| Photo Date | 08/08/2015 |
| Photo by | Steve West |
| At Risk | No |
| Date Record Last Updated | 14/11/2023 |
