Stamped by the print room.
| Identifier | ExFiles\Box 14\6\ Scan235 | |
| Date | 1st December 1931 | |
| ROLLS-ROYCE, LIMITED PRINT ROOM. 1 DEC 31 | ||
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).