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 specification of production inspection and test of a Value Ballast Resistance.
| Identifier | ExFiles\Box 168a\5\ img041 | |
| Date | 13th February 1929 | |
| X7720 To EY. from EFC. c. Mr. Brock. EFCB/T13.2.29. 1i VALUE BALLAST RESISTANCE. Herewith please find copy of Specification of Production Inspection and Test of the above. EFC. | ||