American Flyer Ringling Brothers Circus billboard train layout sign

This is an "American Flyer" billboard sign - RINGLING BROS AND BARNUM & BAILEY, THE GREATEST SHOW ON EARTH - for a train track layout. A C Gilbert company manufacturer label. Not sure what else to say. Look good - looks somewhat dirty but not rust - please see pictures.
This is from my late father's collection which I am selling. I do not know if any of this stuff works but I will try my best to answer questions.
I will combine shipping. From a pet free and smoke free home.