Produced by the Philadelphia Gum Company (the same company that produced the Philadelphia football card sets of the 1960s) The Swell Bubble Gum "Sport Thrills" series was a 20-card set that featured a black-and-white photograph depicting a great moment in baseball history with the story of the event explained on the back. Headlined as "Highlights in the World of Sport " the set featured memorable events throughout baseball history up until the immediate postwar era.These cards are rather difficult to obtain and is very difficult to obtain in high grades due to the cards" unusual sizes and propensity for creasing and edge wear. Many of these cards are found with folds or wrinkles along an entire edge of the card; whether this is a function of storage or how the cards were packed along with their gum is a mystery that is currently lost to history. This particular set is a solid mid-grade raw offering with 10% grading EX 35% grading VG/EX 35% VG 10% GOOD and 10% lesser. Still a glance at the PSA Set Registry should serve as an indicator (but not as a bible as we are well aware of the large number of ungraded vintage collections still in the hobby) of the set"s scarcity: just five sets exist on the All-Time Finest list and only one has an average grade better than 6. Indeed in its entire history PSA has graded just one card from this set at the NM-MT level and none higher; SGC has graded just two. Key cards grade as follows: #3 Jackie Robinson (VG) #4 Walter Johnson (VG/EX) #12 Lou Gehrig/Babe Ruth (G-VG) #14 Lou Gehrig (G) #16 DiMaggio/Gordon/Ted Williams (VG/EX) #19 Feller (EX) An excellent opportunity to acquire a complete set of one of the more interesting and difficult to assemble sets of the immediate postwar era.