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).
Proposed design for a 16 slot, 6-volt armature for S.S.
| Identifier | ExFiles\Box 61\2\ scan0264 | |
| Date | 7th May 1929 guessed | |
| PROPOSED 16 SLOT 6 VOLT ARMATURE FOR S.S. 16 SLOTS. 74 + 16 SWG WIRES .612" .715" .210" .242" .273" .203" | ||