The "Inverted Jenny," 1918, one of the rarest and most valuable stamps in the world, celebrates the first air mail in the U.S.—by depicting an inadvertently upside-down airplane. Hannah Whitaker ...
Waterville bookstore owner Robert Sezak doesn’t collect stamps, but his search for a rare upright Jenny was different. Sezak regularly buys large-denomination stamps so he can ship online orders from ...