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).
Parts list update specifying that two each of a plug for valve chamber, packing washer, and valve spring guide are not required.
| Identifier | ExFiles\Box 16\5\ Scan109 | |
| Date | 15th July 1933 | |
| -2- BY/HEB{H. Biraben}5/M.15.7.33.-Contd- E.{Mr Elliott - Chief Engineer} 80403 Plug for Valve Chamber. 2 off not required. F.{Mr Friese} 85240 Packing Washer for Valve. 2 " " " F.100781 Valve Spring Guide. 2 " " " BY/HEB.{H. Biraben} FABL | ||