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).
Analysis of two different types of bearing whitemetal.
| Identifier | ExFiles\Box 115\1\ scan0169 | |
| Date | 8th December 1936 guessed | |
| BEARING METAL ANALYSIS Standard R.R. Whitemetal RR.Spec.224 Copper 3.6% Antimony 9.3% Tin balance. Hoyt's Z.3. Whitemetal. Silver. 1.7% Antimony. 9.0% Copper. 3.2% Tin balance. ------------ | ||