With a red rectangular date stamp in the bottom right corner.
| Identifier | ExFiles\Box 21\2\ Scan027 | |
| Date | 10th August 1928 | |
| LIMITED D.O.M. 10 AUG 28 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).