The 7th generation Buicks, 1957-58 got a lower body with an even more panoramic windshield equipped with reverse slanted pillars. The unique to Buick Ventiports were introduced in 1949, 4 on the top Roadmaster and Century, 3 on the Super and the Special. With the 1957 styling, the front bullets were pushed to the very outside, the grille a similar shape to 1956 but with convex vertical bars Base model SWB Series 40; The Special, 1936-58 Base model LWB Series 50; The Super, 1939-58 Mid model SWB Series 60; The Century, 1936-58 Top model LWB Series 70; The Roadmaster, 1936-58 Also upmarket Roadmaster Riviera available in 2 and 4 door hardtop