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).
The reverse of a document showing two identical Print Room date stamps from Derby.
| Identifier | ExFiles\Box 14\8\ Scan065 | |
| Date | 31th May 1928 | |
| ROYCE, LIMITED PRINT ROOM, 31 MAY 1928 DERBY. 536 | ||