This is a cool piece of foreign MAD Magazine memorabilia.  Produced in the 1970's for Herbert Feuerstein, the Editor of the German version of MAD Magazine, this item is his personal stamp that was placed onto all of his correspondence.  This stamp contains his personal mailing address, and Alfred E. Neuman is featured prominently in the center.  This auction is for a stamped piece of paper, not the actual stamping device.