Conrail Blue Boxcar?

What railroad owned that boxcar before Conrail?

Anyway, a model of a Conrail blue boxcar is presumably wearing full Conrail lettering and "can opener" logo. Quite unprototypical. I have an old HO scale (Tyco?) 4-bay open hopper in Conrail blue, and I don't believe that's any more realistic.
 
I have the photo encyclopedia of Conrail from 76-87 and the closest thing is those rare yellow can opener boxcars. Pretty much the only rolling stock that was blue was the cabooses and passenger cars. I did see a crane in there in Conrail blue.