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).
Record card detailing information and reports regarding valve springs.
| Identifier | ExFiles\Box 80\3\ scan0076 | |
| Date | 6th October 1911 | |
| Section. X290 HOH 604 DESCRIPTION:- Valve Springs Date sheet from office. 3.10.11 Date Works instruction. Reported T.D. office. Date received. 6.10.11 Material received. Reported to office. Date. Miles.) Report. Reported, see attached. further tests see further cards CP | ||