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).
Estimated cost sheet for extra Jigs, Tools, and Equipment for the 20/25 HP model, introduced during the 'G' series.
| Identifier | ExFiles\Box 86\1\ scan0210 | |
| Date | 8th July 1936 | |
| KESTREL IV STANDARDISATION Est. cost of extra Jigs, Tools and Equipment (See X.No.519 - 20/25 HP). Introduced during "G" series.(Sft{Mr Swift}/GH.8.7.36.) (Without scrap) MATERIAL LABOUR CHARGES TOTAL - - - - - - - - | ||