Hi robert, was under the impression that chameleon was viceroy 3 but exhaust exit is midships as you say 1 was, the story i have is that she was sold to compass craft and converted from folding to sliding, you can see where the original woodwork was, so has had a conversion, when we replaced curtains one old set had viceroy written on hem and when we reupholstered the wheelhouse one cushion had compass craft written on base