Just received from CGC November 2021. CGC 9.4 - 1988 Action Comics #598 - Superman & Checkmate. Key Issue - 1st Appearance of Checkmate! Please see our other Comics, Antiques, Unique, Collectible and Vintage items. This item is in the category "Collectibles\Comic Books & Memorabilia\Comics\Comics & Graphic Novels".The seller is "the_assortment" and is located in this country: US. This item can be shipped worldwide.