 The concept of a single, fixed window over the front seat reappeared in the late 1970s on Lincoln's full-size Continental models (through 1979), and later, over the rear seat of General Motors' 1991 Oldsmobile Custom Cruiser and Buick Roadmaster wagons.Currently, the 2004-2009 Opel Astra offers a "panoramic windshield", which is similar in concept.Mercury's similar Montclair Sun Valley was produced in 1954 and 1955.