Blueprint drawing of a flange indicating where ring washers are fitted.
| Identifier | ExFiles\Box 131\4\ scan0291 | |
| Date | guessed | |
| RING WASHER FITTED. | ||
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).