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).
Specification page for six electrical sets.
| Identifier | ExFiles\Box 6\6\ 06-page334 | |
| Date | 1st October 1937 | |
| -4- Rms4/R.1.10.37. (29) ELECTRICAL. Six sets as per 26.G.VI. Hm.{Capt. W. Hallam - Head Repairs} | ||