| Year | 1961 |
| Date | 31-Aug |
| Volume | 125 |
| Issue | 3,138 |
| Page | 268 |
| Category | Locomotive |
| Part | 14 |
| Title | "Sirena", a 5 in. gauge Sentinel geared steam locomotive |
| Author | J.J.Constable |
| Notes | The slip eccentric and crankshaft. Easy removal, pinion and rack, cutting the rack guides, making the bearers |