A New York auction house is selling what it calls “America’s Most Valuable Postage Stamp”—a 1-cent “Z-grill” stamp from 1868 featuring Benjamin Franklin—and that's hardly an ...
Several stamps are expected to hammer down for more than $1 million, with the rarest being one of two known one-cent "Z" Grill stamps from 1868. If sold for its estimate of $4 to $5 million ...