An early 20th century commercial building, though modest, still retained its original wood double-hung windows until recently. Built in 1917, the Commercial Style structure is typical of many storefronts of its era. The large double-hung windows, an integral part of the style, had been relieved of an obtrusive air conditioner and repainted in a manner typical of the period a few years ago.
Then, new owners opted to replace the century-old wood sash with vinyl units (I can’t tell if these are actually sliders or double-hung units placed sideways). The vinyl units have been stacked on top of each other in order to fill the opening. It remains to be seen what sort of finish will ultimately cover the awkward voids between the vinyl and masonry; exposed plywood and insulation has been the default finish for many months.
The following three photos show the transformation sequence: