This is a partly assembled HOn3 Jordan Spreader.  I have been told it is a Rio Grande Models, Jordan Speader.  I have no other parts but knowing it is a RGM model replacement parts and instructions are still available..  I don't have the original instructions for it so if you can contact RGM and get a new copy.
The upper swing arms swing freely, the lower flange arms also swing freely.  The work so far is excellent.  I have no doubt someone with some ingenuity can figure this unique car out and finish it up making a great looking model.  

https://www.riograndemodels.com/store/RGM-3019-Jordan-Spreader-dual-gauge-less-trucks-p362124188

I do combine shipping for more than one purchase.RGM-3019 - Jordan Spreader, dual gauge, less trucks