The trophy is a model replica of the quartzite monuments that marked the border between North and South Dakota when Dakota Territory split into two states along the Seventh Standard Parallel (45°56'07" N). The monuments were seven feet tall and ten inches square at the top, and were mined and inscribed near Sioux Falls. Charles bates placed 720 markers at half-mile intervals along the border in the summers of 1891 and 1892. The monuments inscribed with the initials "N.D." on the north side and "S.D." on the south side.