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).
Drawing showing side and cross-section views of a jacking point for a structural beam.
| Identifier | ExFiles\Box 26\3\ Scan101 | |
| Date | 10th December 1931 guessed | |
| JACK SHEET C. DONALD SESSIONS & CO. LTD 906, HARROW ROAD, WILLESDEN, N.W.10 | ||