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 an Armature Shaft.
| Identifier | ExFiles\Box 168a\3\ img378 | |
| Date | 20th April 1937 guessed | |
| .980 DIA, -1, KNURLING, ALL OTHER DETAILS SHOWN, DETAILS SHOWN, ARMATURE STAMPING, ARMATURE SHAFT | ||