| Year | 1921 |
| Date | 22-Sep |
| Volume | 45 |
| Issue | 1,065 |
| Page | 244 |
| Category | Radio Engineering |
| Part | |
| Title | Shipping, Engineering and Machinery Exhibition |
| Author | Captain H. de A.Donisthorpe |
| Notes | Messrs. R.M.Radio, Messrs. Radio Communication, Messrs. F.O.Read, Messrs. Siemens Ltd. |