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).
Requesting the acceptance of four 40/50 type spark coils fitted in a Goshawk case for use in Mr. Archer's Department.
| Identifier | ExFiles\Box 45\4\ Scan043 | |
| Date | 28th October 1922 | |
| EFC. Expl. Dept. X.4079.a 28.10.22. X.3445. X.4079 a Please accept four spark coils F.7153 40/50 type fitted in Goshawk case for use in Mr. Archer's Dept. Coils marked on bottom of case. W. Gamble. | ||