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).
List of experimental ignition parts removed from chassis 93-NK before completing 10,000 miles.
| Identifier | ExFiles\Box 69\1\ scan0366 | |
| Date | 23th February 1925 | |
| X4646 EFC. 23.2.25. EXPERIMENTAL IGNITION PARTS ON 93-NK. The following parts were on 93-NK as experimental items before this chassis was dismantled and have not yet completed 10,000 miles. Bone grey fibre rubbing block No.T.2. X.4646. Wax impregnated condenser No.1576. X.8700. HEW. | ||