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).
Request to produce three experimental ignition coils with cases made from Redmanol.
| Identifier | ExFiles\Box 45\4\ Scan240 | |
| Date | 3rd June 1924 | |
| To Mr Brook. C. EFC. X.2079 BY/RD6/ML.3.6.24. C RE IGNITION COILS. Will you kindly produce 3 Ignition Coils identical to present standard except that the cases should be in Redmanol, and hand same over to EFC. Coils should be produced to the usual experimental number. BY/RD | ||