Nibbio II was designed by Ghia in 1956 and shown at Salone Torino in april 1956.  Must have been the base of the Stanguellini-Guzzi Nibbio II of 1957?
Unknown photographer
1956-05-01
<a rel="nofollow" class="external autonumber" href="https://kustomrama.com/w/images/thumb/2/21/Nibbio-ii-ghia.jpg/800px-Nibbio-ii-ghia.jpg">[1]</a>