exceptionally well-built early 20th century antique american industrial refinished old growth pine wood mobile factory stepladder equipped with solid steel wheels or rollers. the oversized angled ladder contains three steps or rungs reinforced on the underside with steel bolts. likely fabricated by or for the boylston steam specialties factory, chicago, il. the incredibly heavy duty mobile stepladder measures 44 x 45 x 27 inches. contains the markings of former boylston factory workers on the underside of the steps.