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).
Page marked with a receiving stamp from the H.T. Room in Derby.
| Identifier | ExFiles\Box 14\6\ Scan200 | |
| Date | 15th June 1931 | |
| LIMITED H.T ROOM, 15 JUN 31 DERBY. | ||