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).
Cover note for the production test specification for an ignition coil.
| Identifier | ExFiles\Box 69\2\ scan0005 | |
| Date | 7th April 1930 | |
| X8712 Sft{Mr Swift}/Mr Brock, from EFC. c. Ry. EFC1/AD7.4.30. X.8712. IGNITION COIL TO D.72503. X 8781 cl. X.5781 cl. Herewith specification of production test for the above type coil. EFC. | ||