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 confirming a dynamo has passed tests and that future testing will be handled by his department.
| Identifier | ExFiles\Box 68\4\ scan0127 | |
| Date | 10th December 1928 | |
| X8664 To Mr. Brock. EFCL/T10.12.28. We return herewith dynamo 4.NB.HO. This machine has passed our tests and is satisfactory for handing to a customer. It is understood that the testing of this type of machine will now be taken over by your department. You have already received Specification of Production Test for H.O. machines. EFC. | ||