One thing I couldn't quite figure out is on the front of the coach there were the two large windows and then two smaller ones above them. I noticed when I was inside the coach you didn't see them which surprised me? I wanted to ask them but thought it would be a stupid question but it made me curious?
The setup you describe was used by several of the converters but Marathon Coach used them more than any other. The coach was built that way by Prevost in Canada and they changed the top glass to black out for the RV market. They are behind the cabinetry and not used. In later years Prevost dropped the construction of this setup and the painted cap was the only option in the standard XL style Prevost but the larger H series busses retained the 2 sets of glass.
We drive an '88 XL and replaced the 2nd couch up front to give us dramatically more room in that area. No slides and we like it that way. The slides only give you more floor surface to clean! :p :D