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boxingcardmanI'd say that prewar is before 1946; postwar is after. IMO the modern card era started in earnest about 1947 with the issuance of several commonly collected regional and other sets (Bond Bread, Tip Top, Exhibits, and on the west coast Signal Oil, Remar, Smith's, Sunbeam). The gum card modern era started in 1948. However, there were clearly card issued during the war, so it isn't a bright line.
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