’53 FELLER!!!...One of these thin paper window signs was inserted in each case for retailers to promote their newly received stash of Topps baseball cards. The fold lines are as issued from insertion (not a defect). Solid, excellent condition with only minor signs of handling. The ultimate piece to the ultimate high-grade set. Very scarce and only a few of these fragile pieces survived the last 70+ years. This item measures 7 inches by 11 inches.