Marvel are Premier/Multivox products (Sorkin Music being the parent company).
http://en.wikipedia.org/wiki/Multivox_Premier
Certainly some of their guitars were made with some parts that were outsourced, such as United-Code laminated bodies. I could certainly believe that neck was made by Kay. But they did at least some of their own manufacturing as well before going import-only sometime in the mid to late 60s. I have a couple of Premier electrics and have seen many others. Marvels are not as common but I have seen a few, both acoustic and hollowbodies with pickups (I think all of those I have seen were non cutaway archtops).