| Year | 1929 |
| Date | 12-Dec |
| Volume | 61 |
| Issue | 1,492 |
| Page | 558 |
| Category | Model Petrol Engine Topics |
| Part | |
| Title | The "Wall" Two-stroke Engine |
| Author | Edgar T.Westbury |
| Notes | General arrangementsectional elevation, air-cooled type, Wall Junior, section of carburettor |