| Year | 1949 |
| Date | 25-Aug |
| Volume | 101 |
| Issue | 2,518 |
| Page | 261 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters. Two 5-in. gauge locomotives, exactly alike externally but very different internally |
| Author | J.I.Austen-Walton |
| Notes | Motion plates and metal pattern (photo by A.Duncan), axle boxes, outer race for roller bearing, roller, axles, oil feed & spring seat, pump eccentric, eccentric key, rubbing washer |