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 estimated costs for manufacturing coil part number D.75673.
| Identifier | ExFiles\Box 164\5\ img275 | |
| Date | 3rd May 1937 guessed | |
| 6017 ESTIMATED COSTS OF COIL TO D.75673. Winding 1.836 material .982 labour. Insulator D.74448 - .250 material. Coil case D.74449 - 1/- each. Coil insulator D.74450 - 1/3 each. Total cost = 4/4 + 1/9. = 6/1. R.R. coil to D.72503. = 14/- Saving 8/- ---------------- | ||