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).
Heavily faded technical drawing with a receiving stamp in the bottom left corner.
| Identifier | ExFiles\Box 16\4\ Scan240 | |
| Date | 5th January 1931 | |
| P'D 5 JAN 31 DERL | ||