Data log sheet showing numerical readings over a one-hour period.
| Identifier | ExFiles\Box 160\3\ scan0130 | |
| Date | 28th January 1939 guessed | |
| 55 53. 173.088 56 53.1/5 172.437 57 53.3/5 171.130 58 53.1/5 172.437 59 53.3/5 171.130 60 53. 173.088 61 52.3/5 174.404 62 53.3/5 171.130 63 54. 169.882 64 53.3/5 171.130 65 53.3/5 171.130 66 53.2/5 171.791 67 53.1/5 172.437 68 53.4/5 170.514 Finish of I hour. | ||
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).