Important drawing by Gio Ponti of the Diamante line for Touring Carrozzeria Milan. Documented in Gio Ponti; L’Arte si innamora dell’industria by Ugo La Pietra, page 254-255 and on page 167 of Gio Ponti: The Complete Work by Lisa Ponti. Ponti’s car designs where never realized, but his design ideas where very important for the development of the modern car. A unique drawing by the most important Italian architect and designer of the 20th century. My Modern offers excellent fast & affordable worldwide shipping.