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 cross-section of a Standard Drip Plug.
| Identifier | WestWitteringFiles\T\2July1929-December1929\ Scan010 | |
| Date | 13th July 1929 guessed | |
| STANDARD DRIP PLUG. A.{Mr Adams} B. C. D.{John DeLooze - Company Secretary} F.{Mr Friese} H.{Arthur M. Hanbury - Head Complaints} L. O.{Mr Oldham} R.{Sir Henry Royce} | ||