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).
The alteration of three 28-slot armatures.
| Identifier | ExFiles\Box 68\4\ scan0033 | |
| Date | 28th January 1928 | |
| X8672 C. EFC. BY/RD4/ML.28.1.28. 28 SLOT ARMATURE - D.71347/8. We have made 3 armatures to the above piece numbers, one of which was altered to EFC's instructions, this alteration having proved satisfactory will you please have the other two armatures altered to agree with our drawing D.71347/8 with alteration 2513/D.{John DeLooze - Company Secretary} The armatures can be obtained from EFC. Duplicate BY/RD | ||