As the head of Ghia, Segre singularly directed and incubated the project through conception and prototyping, delivering a feasible project that Willhelm Karmann both wanted to and could practically build — the project Willhelm Karmann would in turn present to Volkswagen. The styling itself, however, integrated work by Segre as well as Mario Boano, Sergio Coggiola, and designer/engineer Giovanni Savonuzzi — and at various times they each took credit for the design. Furthermore, the design bore striking styling similarities to Virgil Exner's Chrysler "D'Elegance" and K-310 concepts, which Ghia had been tasked with prototyping — and which in turn reflected numerous cues and themes developed previously by Mario Boano. The precise styling responsibilities were never documented before the passing of the designers, further complicated by the overlapping work of the key players. A definitive individual attribution on Karmann Ghia's was never made.