Two-door "hardtop convertible" or "hardtop coupe" bodies with B-pillars truncated at the beltline entered mass-production on some 1949 model year Oldsmobiles, Buicks and Cadillacs. Four-door versions appeared on 1955 Oldsmobiles and B-body Buicks. These were soon followed by 4-door hardtop sedans from other General Motors brands as well as from Ford Motor Company, Chrysler Corporation and (briefly) American Motors.
Federal regulations regarding rollover integrity in the early 1970s ended hardtops due to their lack of a B-pillar extending up to the roof framing. The last American hardtops, 2-door and 4-door, appeared on 1978 Dodge Monacos and all Chrysler Newports and New Yorkers.
Some first-and-last examples are pictured below.
1953 Cadillac Orleans Concept Car - General Motors photos
GM was testing the hardtop sedan body type on this Motorama show car. Also panoramic windshields on cars with fixed tops. (Convertibles with wraparound windshields were offered for 1953, as my post "1953 Oldsmobile Fiesta and Cousins" describes.)
The Orleans had absolutely no B-pillar. Doors were hinged on the A and C pillars with latches down low on the frame.
1955 Buick Century Riviera Sedan - BaT Auctions photos
The first GM production hardtop sedans were on 1955 B-body cars such as this Buick Century.
The forward side window area included a Ventipane. Rear door windows were once-piece for nearly all hardtop sedans ever built -- with an exception pictured a ways below.
Note the fashionable three-tone paint scheme.
1955 Oldsmonile Ninety-Eight Holiday Sedan - car-for-sale photos
Buick and Oldsmobile 88 hardtop sedans had 122-inch (3099 mm) wheelbases. Olds Ninety-Eights such as show here had 124-inch (3150 mm) wheelbases. The result was a better proportioned design.
1956 DeSoto Firedome Seville hardtop sedan - BaT Auctions
Chrysler Corporation redesigned its line for 1957, so its '56 hardtop sedans were the result of what appeared to be a crash project. Note the awkward-retraction rear door window. My family owned such a DeSoto because I pestered my father into ordering it rather than a conventional sedan. In retrospect, I was wrong, the sedan being more practical.
1978 Chrysler New Yorker Brougham hardtop sedan - BaT Auctions
The end of the line.
























































