The rear of a document showing a purple date stamp.
| Identifier | ExFiles\Box 31\4\ Scan076 | |
| Date | 10th September 1931 | |
| ROLLS-ROYCE LIMITED 10 SEP 31 DERBY. | ||
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).