I lived full time for four years in a 1968 24’ Holiday Rambler with large banks of jalousie windows
. And yes, they’re wonderful... except in winter. Temperatures where I was living dropped to around 0*F occasionally, but low 20’s was more typical. I added plastic on the inside each year. Much better, but it didn’t do much for the view!
It was a wonderful trailer, well constructed with an aluminum frame and all-composite cabinetry, leak-free after 20 years, great layout, otherwise equipped for four season use. I don’t think dual pane windows
were available in 1968.