original and completely intact adjustable height factory stool salvaged from a chicago gear and sprocket factory. features a bent tubular steel four-legged base comprised of heavy gauge steel. the heel ring or footrest is welded firmly to the legs. the centrally located threaded spindle moves upwards and downwards with ease. adjustable folded steel backrest. original solid maple wood circular seat. likely fabricated by the adjusto equipment co., bowling green, oh.