In the late 1950s General Motors launched a crash-redesign program in response to the redesigned 1957 Chrysler cars. Given automotive development timelines, those new cars did not appear until the 1959 model year. I wrote about one aspect of the new styling in the post "General Motors' 1959 Four-Door Hardtops" here.
"A Century of Automotive Style: 100 Years of American Car Design" by Michael Lamm and David Holls on page 180 mentions two innovations for the 1959 General Motors models. One was Pontiac's two-segmented grille pattern. "The second was the 'flying wing' or 'cantilever' roof on the 1959 GM four-door hardtops. Credit for the design goes to a young Japanese-American stylist named Bud Sugano, who proposed it in early 1957. Carl Renner, under Clare MacKichan in the Chevrolet studio was instrumental in 'productionizing' the flying wing for 1959. Renner ... extended the flying wing not only to all five GM lines but also to the 1960 Corvair sedan."
That roofline included a one-piece backlight window that was drastically curved. One can characterize it as panoramic or wraparound -- terms in use at the time, though "wraparound" was what most people seemed to call the fashionable panoramic windshields in those days.
GM continued that style through 1959 and 1960, then included it for some of its redesigned 1961 cars. Then it was was abandoned on facelifted 1962 models due to declining 1959-1961 panoramic backlight sales for brands such as Oldsmobile and Cadillac.
Today's featured car is the entry-level version of that roof/backlight style. It is a 1961 Chevrolet Biscayne two-door sedan listed for sale.
1961 Cadillac Deville 4-window hardtop sedan - car-for-sale photo
But first, an example of a panoramic backlight on a fancier GM car. The roof/backlight treatment is more refined than on the Chevy below. As should be expected.
1961 Chevrolet Biscayne two-door sedan photo set
GM's 1961 redesign was a huge improvement over the 1959-60 cars. Styling boss Bill Mitchell and his crew had more time to move on from Harley Earl's mostly unfortunate 1957 and 1958 creations. The new designs included A-pillars having a curious little curve at their roots. Perhaps a farewell gesture to the wraparound windshield era.
Initial "flying wing" rooflines had mouldings linking the upper rooflines across C-pillars. That feature is missing here.
Upper backlight frames are actually a bit higher than side window upper framelines. This slight discontinuity was absent on GM 4-door, 4-window hardtop sedans that lacked the heavier door framing seen here. At any rate, this discontinuity degraded styling.
Panoramic backlights might have provided all-round exterior visibility for drivers and passenger.
But such visibility was almost never needed under normal driving conditions.
Wheel openings are racey towards their rears, but the passenger compartment greenhouse rear isn't.
Note the extent of window glass in this frontal view.