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 cover with a handwritten note about drilling for seepage clearance.
| Identifier | ExFiles\Box 173\3\ img061 | |
| Date | 7th December 1933 guessed | |
| ALT. LTR. ALTERATION DATE SEEPAGE DRILLED THROUGH HOLE AND THROUGH CLEARANCE WHEN TAPPET AND GUIDE AT FRONT | ||