The P.68 Observer, a transparent-nosed, dashboard-less variant of the already unusual high-winged twin built by Italian state-owned Partenavia for law enforcement use

The observer nose came after the original version. Originally the two rear windows were oversized to allow observation, on some the windows could be opened or removed really not a great idea though, as the folks in the back are ideally suited to get all the noise and airflow off the engines. On one flight the rear intercom jacks on both sides failed and the folks in the back, no matter how hard they shouted could not be heard from up front, necessitating a very frustrating return. On another while I was in the back the same thing occurred which resulted in a very pleasant flight of me being paid to do absolutely nothing but enjoy the view. The observer nose didn't sell well, basically being sold to government operators and eventually passed on to private hands, so there are more with the original nose than without.