| Year | 1950 |
| Date | 09-Nov |
| Volume | 103 |
| Issue | 2,581 |
| Page | 721 |
| Category | Petrol Engine Topics |
| Part | |
| Title | A 10 c.c. Twin Four-Stroke. "Seagull" |
| Author | Edgar T.Westbury |
| Notes | Alternative wiring diagrams for twin-cylinder engines, contact-breaker (general arrangement), contact breaker face, details of components |