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).
Stating no objection to the use of Duckham's oil.
| Identifier | ExFiles\Box 32\4\ Scan281 | |
| Date | 27th November 1929 | |
| X1588. D/BP. from Hs.{Lord Ernest Hives - Chair} Hs{Lord Ernest Hives - Chair}6/AD27.11.29. DUCKHAM'S OILS. With reference to attached, we have had sufficient experience with Duckham's oil to be able to say that there is no objection why this oil should not be used if a customer desires. Hs.{Lord Ernest Hives - Chair} | ||