For example, "the Elcar in 1924 was good looking ... and even a fabric top in the style of a brougham with oval opera windows framed by landau bars".
[5] Opera windows began reappearing in the early 1970s in such vehicles as the 1972 Continental Mark IV.
Almost all personal luxury cars would adopt opera windows, usually framed by a vinyl roof.
[6] Most often, opera window variants were applied on two-door hardtop or coupé models, spanning all types of vehicles from economy compacts to flagship personal luxury cars, in which latter exploding realm they became "recognition elements" seeking to add a vintage element to their styling.
The windows were intended to offset the significant blind spots created by wide C-pillars that were characteristic of many American cars produced at this time.