As per Will Eley's pictures this organ looks strikingly familiar to
the Ruth at Lake Winnepesaukah which was shipped with the PTC carousel
it is now on.  Not only is the pipework visible, but also where the
original key frame was mounted and later covered up on the organ case.
I do not know if that organ ever played B.A.B. provided rolls.

Dave Haibach
Elk Horn, Kentucky