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).
Technical drawing of a Scuttle Ventilator (H.O.).
| Identifier | ExFiles\Box 119\3\ scan0172 | |
| Date | 18th August 1931 guessed | |
| COLT VENTILATION LTD. BUSH HOUSE, LONDON, W.C.2. Protected by Worlds Patents and Registered Designs Scuttle ventilator (H.O.) ATT DIMENSIONS DATE THIS DRAWING IS THE PROPERTY AND COPYRIGHT OF COLT VENTILATION LTD. Nº 19 | ||