Richard Hough, A History of the World's Classic Cars, Harper & Row, 1963
The Daimler double six was produced by the company from 1926 to 1938 to power their top of the line cars. Two sleeve valve inline sixes were grafted onto a common crankcase to create Britain's first 12 cylinder car engine. The engine was built to upstage Rolls Royce's newly introduced Phantom. No artist is named for producing this illustration.