A purported back cover scan (possibly inside back cover) is a full-page ad by the Chicago Mail Order Co., although not the typical back cover picture of their building as seen on C-M-O Comics #1-2. This would be similar to Liberty Guards Comics, which has full-page Chicago Mail Order Co. ads on the inside front cover and inside and outside back covers, with no indicia of any sort present anywhere. Both are probably some sort of CMO giveaway, but this has never been clearly established in either case.
Both this comic and Liberty Guards re-use the cover art of other Comic Corporation of America publications, with a new title banner without any price or numbering. In this case, the cover art comes from Stars and Stripes Comics #2. If the analogy with Liberty Guards holds, the contents are probably a full-issue reprint, although likely not from the same issue as the cover.