I think you are correct, here. Its "real" stuff, thrown together in all likelihood. Whether or not its worth breaking up will depend on the final price, of course. The happiest outcome would be for someone to mate long sought bits together in their proper places.
The real drama is that it appears to be somewhat "improved", but not to the level expected in post war service. BTW IF you've some old paper, there's no shortage of WWII vintage typewriters to make all the "matching kit" labels you want....