I recently attended the Stevens Point, WI Annual Arctic Run train show the first weekend of this month.  I found a old HobbyTown RS??????

I have no idea which RS  it is.  The gearbox is in the frontend on this one and there is a weight cast, let me repeat, weight cast into the center of the engine.  It is not: the 1600, 220K, or the 300K.  All 3 of these have the drive gear in the rear hood casting.  Nothing on this one on HoSeeker either.  

She runs great, but has had a different motor installed. Hope somebody can give me some info. 

Oh, I picked up the front end of a Bowser Pacific Vanderbilt Tender from a junk box while I was there.  Heck of  good day and the GrandKids both loved it!!