A snazzy pipe load, I like how the individual pipes are staggered and off kilter like a prototypical load rather than a perfect even stack, on an even snazzier G72. I think at least I can't really make out the lettering in those pictures.
That's an ex-Southern Silverside Gondola built in the early 1960s. They are aluminum and were a shiny silver color when first built, hence the name silverside. Southern used them in some of the very first unit trains loading up at Appalachia and sending them south to power plants on demand. I don't know much of their post merger history, but by the that time they were weathered and dulled to the point where they lost their trademark shine which is why matruck's model looks like that.