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).
Note specifying the metallic composition of standard pistons under reference X.3198.
| Identifier | ExFiles\Box 37\3\ scan 027 | |
| Date | 15th October 1917 | |
| R.R. 235 B (380 H) (S.D. 442. 8-6-17) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1966. EFC8/T15.10.17. to WDR. for Mr. Kesterton. from EFC. X.3198 - STANDARD PISTONS IN Mr. HALL'S SPECIAL METAL CONTAINING - 1.16% of Nickel. 5% " Copper. 85% " Antimony. In answer to your sheet, please note that these pistons may be instructed up under the above X. number. EFC. | ||