[jrnyfilms]

I would guess it's a kit car. Many had tin sides and non opening doors. Walthers, Athearn and many others made fine cars as kits. Don

 

[jrnyfilms]

You might think about picking up a couple of kits on E-bay. They are cheap and fun to build. Just add a couple of Lionel trucks and your ready to go. Plus it's nice to know you built it yourself. Don

 

[jrnyfilms]

Go to E-bay and type in O scale box car kit. Lots of them. Don