Found this rare item at an auction recently. It's a large platter (15" X 11") made for the U.S. Army medical department. Cook Pottery Co. trenton NJ. made various tableware at their one plant and electrical porcelain and speciality items at their other plant. Most notably their Wedge split nail knob. This is the first piece of pottery I've seen made from them. Here is a picture of the platter. It's huge. Don't know if it was dinnerware or other uses.