Hello, this is my first post and hope I did it correctly. I was just wondering if anyone had any information to share on this sand finish Purina sign? It measures 4'wide x 5'tall and weighs 15-20 pounds and is painted tin with one remaining piece of wood frame that is stamped "Property of the Ralston Purina Company". Any help would be greatly appreciated,thanks. Where you see blue/black on this sign is where the sand finish is. The rest of the sign is smooth paint.