The rest-and-relief dental stool was manufactured by the Ritter company of Rochester, NY. This 1930s stool swivels on a ball joint and can rotate and flex at any angle. This stool was designed to relieve the doctors back during examinations and procedures. This stool retains its original Ritter Model C 1, 18C13907 label. This piece is in good condition, showing wear with scratch marks on the base and some small damage to a corner of the stools seat, as pictured. The diameter of the base measures 11.75", with the seat measuring 11" in diameter. This stool can sit at either a height of 23" or a height of 30". JM - 072222 - 104725