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 of faint handwritten numerical calculations with a library stamp.
| Identifier | ExFiles\Box 43\2\ Scan209 | |
| Date | 7th July 1927 | |
| 575 3750 4125 3720 405 4125 31 1200 3720 ROLLS-ROYCE. LIMITED PRINT ROOM 7 JUL 1927 | ||