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).
Covering letter for a rev counter calibration sent to E.R. Hall.
| Identifier | ExFiles\Box 90a\4\ Scan256 | |
| Date | 29th May 1936 | |
| +v62 Exptl. Dept. 29th May, 1936. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}14/KW. E.R. Hall, Esq., 53. Berkeley Court, LONDON, N.W.1. Dear Hall, Here is the calibration of your Rev. Counter. Yours sincerely, | ||