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).
Folded blueprint cover with a reference number in the title block.
| Identifier | ExFiles\Box 176\2\ img353 | |
| Date | 13th January 1941 guessed | |
| PL513 | ||