PASSENGER WINDOW???? Do you mean rear seat passenger windows??
Up to 1971 in all Squares. After that ( 1972 on ) the slots in the B pillar were there in the Squares but not the actual hinge piece. If popouts are to be fitted the hinges have to be sourced from an earlier model
Notches had popouts to 1963 here but local production dropped them. To fit them in 1964 on they have to have hinges put in as the late Squares as only the slots are in the B pillars. Imported Notch S had them to 1965. Not sure if Germany retained them to later years.
To save much typing have a look here:
http://forums.aussieveedubbers.com/viewtopic.php?tid=85546&page=1#pid799238
DH