Beginning in the mid-1970s, DC reissued several of its most popular Golden Age comics as "Famous First Editions", including "Action Comics" #1, published in 1974. These reprints were oversized, roughly double the size of the original editions, and had a cardboard-like cover. The interior, however, was an exact reprint of the original comic, right down to the ads. As a result, the "Overstreet Comic Book Price Guide" has, since the 1970s, published a warning advising that attempts have been made to pass off the reprint, stripped of its "Famous First Edition" cardboard cover, as an actual #1. However, the Guide does not cite any actual instances of this.