Chances are you've never heard of Carrozzeria Caprera but they designed one of the most beautiful cars based on the 850: The Caprera Berlinetta. Very little to be found on the internet so enjoy this photo:
In their enthousiasm, a Belvedere was built too, a Familiare based on the 850 Berlina. Finally you could take your weekend groceries with you in one go.
Their largest business achievement was the construction of steel sliding roofs:
Not a lot of information can be found about these sliding roofs too so I am happy with some pictures from Quattroruote.