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).
Advertisement sheet for a patented Scuttle (H.O.) type combined air extractor and wind scoop from Colt Ventilation Ltd.
| Identifier | ExFiles\Box 119\3\ scan0169 | |
| Date | 18th August 1931 guessed | |
| COLT VENTILATION LTD. BUSH HOUSE, ALDWYCH, LONDON, W.C.2 Deflector lowered—used as wind scoop. Deflector raised—used as air extractor. View of operating handle inside car. Scuttle (H.O.) Type Combined Air Extractor and Wind Scoop (PATENTED) | ||