i never see em i only see em rollin.... :( :(
Count yourself lucky, ive never seen one in my life, and if i wanted to see one id have to pay a large amount of money.
ANyways, check this bad boy out.
There was a spot over here years back that hard nothin but these. I wasnt into frieghts that much then so I dunno wut they were doing, but Im guessin they were buildin them and just stackin them there until they were done. That spot was gravy and someone coulda had a blast. Now the spot is nothin but tankers and hoppers.
I'm just guessing it's some sort of stamping they do for marking purposes....Kind of like a plat C or some shit...
I don't know. I just figured someone would acutally know the real answer...
By the way the sarcastic reasons listed are halarious haha...