| Year | 1988 |
| Date | 05-Aug |
| Volume | 161 |
| Issue | 3,830 |
| Page | 145 |
| Category | Countryman's Steam |
| Part | 1 |
| Title | Superba. Fowler Class Z7 and Superba Ploughing Engine in 2 in. scale |
| Author | John Haining |
| Notes | The Z class develops, the Superba engines are born, Superbas at work, the 2 in. scale engine |