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).
Sketch of a riveted and seamed steel shield with annotations.
| Identifier | ExFiles\Box 88\5\ scan0124 | |
| Date | 3rd October 1935 guessed | |
| F SEAM. SHIELD .022 STEEL SWEATED ON RWETS ABOUT 6" PITCH. | ||