| Year | 1989 |
| Date | 06-Jan |
| Volume | 162 |
| Issue | 3,840 |
| Page | 48 |
| Category | Countryman's Steam |
| Part | 6 |
| Title | Superba. Fowler Class Z7 and Superba Ploughing Engine in 2 in. scale |
| Author | John Haining |
| Notes | Front and hind wheels, looking at design history, field trials, superheating - rail v field, cylinders for the model |