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).
Instruction to change 73° condenser sentinels for 65° ones on various GII units.
| Identifier | ExFiles\Box 52\3\ Scan123 | |
| Date | 31th August 1923 | |
| X.4430. To S.Pollard. from EFC. {E. Fowler Clarke - Electrical Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 5/T31.8.23. Please change 73° for 65° condenser sentinels, when possible, on 3GII, 4GII, 5GII, 6GII, and put one on 7GII. 5 sentinels herewith. Please inform me of the dates these are fitted. EFC. {E. Fowler Clarke - Electrical Engineer} | ||