From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Cover page indicating the commencement date of a test.
| Identifier | ExFiles\Box 11\5\ 05-page126 | |
| Date | 1st August 1934 | |
| 28-EX - COMMENCED TEST AUGUST 1934. | ||