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 comparison from Thos. Firth & John Brown Ltd. detailing the difference between 'Solid Eyes' and 'Rolled Eyes' for springs.
| Identifier | ExFiles\Box 87\4\ scan0128 | |
| Date | 5th June 1936 guessed | |
| THOS. FIRTH & JOHN BROWN Limited. Continuation Sheet No. 1. Dies and preparation in the case of Solid Eyes. - Cost .. 19. 0. Dies and preparation in the case of Rolled Eyes. - No cost. A difference of ... 19. 0. Direct Wages and Charges in the case of the Solid Eyes. .. £4. 1. 1. Direct Wages and Charges in the case of the Rolled Eyes. .. 3. 18. 6. A difference of ... 2. 7. Total. ... £1. 6. 3. Thus it will be seen that these separate items will amount to £1. 6. 3. for each Spring, as stated in the previous paragraph. The experimental Springs we are manufacturing, you will understand, cost much more to produce, but we have based the figures given above on quantity production, as stated. With regard to your letter of April 24th and the Springs to drawing F.88459, we are not yet able to give you the comparative costs of these types of Springs, but will do so at the earliest opportunity. Yours faithfully, THOS. FIRTH & JOHN BROWN, LIMITED. John Smith Director. | ||