The roll-down windows in the sliding doors?
New was a two-door sedan bodystyle, unusual in having roll-down rear windows.
The interior used velor finishing, nickel plating, mohair rugs, mahogany panels and roll-down windows.
Also, new rooflines were featured on Holiday hardtop coupes with fixed triangular side windows replacing roll-down windows of previous years.
That is relatively reasonable, and with useful features like the folding third-row seat and roll-down rear windows, the MPV would be my pick of the small minivans.
The design essentially gave the cars a B-pillar, though small roll-down windows just aft of the doors remained for a true pillarless look.
Family wagon features abounded, with roll-down windows at each door, a tailgate with retractable window, and a stylish instrument panel.
Scout 800 (1966-1971): Same overall design as original with upgrades (roll-down windows, etc.)
In place of roll-down rear windows, the Roundup used sliding windows.
Retractable window: In the early 1950s, tailgates with hand-cranked roll-down rear windows began to appear.