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).
Blueprint showing a modification to a top half big end bearing.
| Identifier | ExFiles\Box 132\4\ scan0010 | |
| Date | 25th April 1934 | |
| B.V. 52 OFF SIDE 22 1/2° .020 .156 NEAR SIDE ALL OTHER DIMENSIONS SEE E55613 SCALE 2/1 MODIFICATION TO TOP HALF - BIG END BEARING R.M. 25.4.34 | ||