The Mark Jeweler inserts are variants of popular comics from the 1970s. These variants, unlike many other comic variants, are not subject to one comic company, but both DC and Marvel. In the mid 1970’s DC and Marvel comics included a four page color insert in a number of their comics. These inserts can be seen if one looks at the top edge of the comic, then one will see a blue heavy stock insert. There is a belief that these variants were distributed near U.S. military bases, both at home and abroad. These Mark Jeweler inserts allowed servicemen to purchase jewelry and engagement rings. The ratio of standard comics to the number of variants is currently unknown, but it appears that the variants were produced in a smaller quantity.
Example of Insert: