We made our skully caps in the early 60s in Flatbush both from crayon wax and the actual corks that were inside certain soda bottles. We would carefully pry out the cork lining (sometimes topped with silver foil – a treat!) and add it to another bottle cap, creating the “double corker.” A wax-filled cap was illogically (or not if you are 12) called a “wax corker.” We even occasionally made a “lead corker,” as described by a previous discussant. Our skully board was nine boxes (9 in the middle, surrounded by the trapezoids which were numbered 1-4).