A Clear Ball Perfect Mason Quart Canning Jar produced between 1933 and 1960. The Ball Perfect Mason Jar features the Open B with the underscore and gripper ribs around the sides. The Bottom of the Jar has a series of rings and the number 2 and there is an extra ring around the shoulder of the jar. The canning jar measures 6 7/8's inches tall and has a top diameter of 2 5/8 inches. The jar has air bubbles throughout and no chips or cracks.