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).
Front cover of a leaflet for a Smith's Oil Filter.
| Identifier | ExFiles\Box 135\3\ scan0215 | |
| Date | 27th August 1937 guessed | |
| SMITH'S OIL FILTER 1139 | ||