The two-door, pillarless 1949 Roadmaster Riviera was among the first production vehicles ever to have this feature. In 1955, Buick also produced the first 4-door car with this feature, as well, the Century Riviera.
Answer Hardtop
The hardtop was introduced on three models in 1949.
Asked by Dan Henry · Last updated 4 months ago · 45.5K views
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