Found this over the weekend while going through a relative's personal effects. It has the original engine and tender, Illinois Terminal boxcar, gondola and caboose. Also in the box was the rocket launcher flatcar. There was also a "loader" control panel but no car and nothing else except some paperwork. There was no transformer.
The area on the side of the box for the Train Set No. is faintly marked "Not Advertised". The trackage is in poor condition, but looks like it could be restored with some time and effort.
It appears to have been sold through Hub Distributors in Boston to Topps Auto Store in Cambridge, MA. It says "7 pieces" so maybe the set did come with the rocket launcher and missing loading car.
Also, not sure if the set has any appreciable value.
Thanks for any help.