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).
Blank document with a 'Patent Room' stamp from Derby.
| Identifier | ExFiles\Box 27a\2\ Scan153 | |
| Date | 4th May 1933 | |
| 7" ROLLS-ROYCE, LTD. PATENT ROOM 4 MAY 1933 DERBY, | ||