Need to identify scale of this McKean Model

New to this forum. Daughter of a former Hobby store owner who passed in 2004. I’m selling off the store inventory from 1990’s for my 90 year old Mom via ebay. Been doing alright as far as my memory of trains go, but this one McKean Model looks too large to be HO.

I’m hoping one of you can help. It’s a McKean Model Union Pacific Center Beam Oval Car 217135 stock no 170. The side panel part of the car looks to be about 8.5 inches 1.5 inch tall. Is this just an unusually large car or could it be O or G?

It is a HO scale model of a 63’ long center-beam flat car.

63’ is about 8.5" in HO scale

There are several similar cars for sale on ebay. This link is to a Burlington Northern version.

http://www.ebay.com/itm/McKean-1701-HO-Scale-Burlington-Northern-63-Oval-Center-Beam-Car-BN624175-NIB-/160900697352?pt=Model_RR_Trains&hash=item25766dcd08

Thank you DSchmitt. Much appreciated. [Y]

Looks like the same model Exact-Rail is comeing out with.