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).
Cost estimation sheet indicating nil tool cost for an order for the 'KU' Series.
| Identifier | ExFiles\Box 86\1\ scan0227 | |
| Date | 9th November 1936 | |
| WHITNEY STANDARDIZATION CHARTS X Estimated Tool Cost - Nil. Ordered for "KU" Series. MANUFACTURE LABOUR MATERIAL TOTAL | ||