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).
Polished markings on gudgeon pins and piston tops, and subsequent measurement of cylinder bores.
| Identifier | ExFiles\Box 130\2\ scan0160 | |
| Date | 25th September 1936 guessed | |
| (5) The gudgeon pins shows polished marking on both ends and piston tops showed a similar effect. We have taken the opportunity to measure up the cylinder bores of S-B-IV as follows. | ||