From the official Press Release:

On the occasion of the 100th anniversary of the Diatto brand, two keen collectors turned to Zagato with the aspiration of resurrecting past collaboration.

Way back in 1921, Ugo Zagato designed a lightweight and aerodynamic body for the Diatto 25 4DS chassis.

In 2007, the Milanese Atelier with its typically rationalist approach to a project, revamps, with a sporty note, the artistry of one of the most historical brands of the Italian automotive industry: Diatto.

About Diatto Automobili

Created by Guglielmo Diatto in 1835 with a Perfected Wheel patent, the Diatto industry became one of the major European railway-carriages manufacturers.

It was turned into an automobile factory by Vittorio and Pietro Diatto in 1905 and often crossed paths with Zagato in their close collaboration with Ettore Bugatti, the Maserati brothers and Tazio Nuvolari.

To know more about Diatto, you can visit www.diatto.co.uk.

Among the many available documents is an interesting history of the brand (also available in pdf format).

Additional information about Diatto can be found on www.museoauto.it (in Italian).

(Source: Zagato via Virtual Car)