Superleggera

Most of the panel has no rigid or metal-to-metal contact with the framework, it merely rests on it, with the tubes wrapped in hessian or with a rubber spacer.

[2] The superleggera system was primarily based on the use of 'Duralumin',[citation needed] a material that originated in the Zeppelin industry prior to World War I.

The company was located just north of Milan, near Alfa Romeo, Italian Citroën, and the former Isotta Fraschini plant.

In England after World War II, the alloy Birmabright was used, as it was stiffer in thin sheets and more widely available.

Car makers such as Bristol, which had aircraft industry experience, were more successful in countering galvanic corrosion than other manufacturers.