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).
Page 2 of a document detailing the percentage composition of a material.
| Identifier | ExFiles\Box 37\4\ scan 115 | |
| Date | 23th June 1917 guessed | |
| Contd: (2) of aluminium, 9.64 copper, .23% of zinc, 1.15% tin and .10% of magnesium. EFC. | ||