 Contrary to popular belief, Dunning and his firm were not responsible for the Tip Top Tailor building - although sharing many design aspects with the Merchandise Building, it was produced in the year 1929 by the firm of Bishop & Miller.The Robert Simpson Co. Ltd.Mail-Order Building incorporated many features, that while commonplace today, were relatively novel at the time - a steel structure, reinforced, fire-proof concrete, well-positioned emergency stairwells, and large windows for natural light.