These cards were issued with scrip to promote Spalding products. The cards can be found with biography backs and blank backed. Handcut cards are known as well since it appears that sheets of the set were issued. They are thinner stock and easily damaged, so these three cards are a great start on a high grade set: 1927 Dempsey SGC 84, 1926 Rosenberg SGC 88 and 1926 Tunney SGC 92.