OER Parts offers a wide selection of Window Seals for your 1940 Buick Century Series 60. OER Parts offers 1940 Buick Century Series 60 Door Window, 1940 Buick Century Series 60 Quarter Window, 1940 Buick Century Series 60 Vent Window, and 1940 Buick Century Series 60 Windshield & Rear Window.