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).
To Mr. Brock regarding the expectation of receiving a 20 HP production dynamo for a monthly test.
| Identifier | ExFiles\Box 165\6\ img174 | |
| Date | 18th September 1928 | |
| To Mr.. Brock. X5660 EFC2/T18.9.28. We are expecting to receive from you a 20 H.P. production dynamo - for monthly test. EFC. | ||