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).
Blueprint of a cylindrical mechanical component with internal features.
| Identifier | ExFiles\Box 85\3\ scan0026 | |
| Date | 19th May 1934 | |
| 3.384', 2 29/32', 1 7/8', 3/8, 7/16, .6875', .6870, ROLLS-ROYCE, LTD, PRINT ROOM, 19 MAY 1934, DERBY | ||