The reverse side of a technical drawing with a Print Room stamp.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan159 | |
| Date | 20th January 1931 | |
| ROLLS-ROYCE, LIMITED PRINT ROOM, 20 JAN 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).