The Jenny Invert Plate-Number Block

This is the story behind the world's greatest stamp rarity: the Jenny Invert Plate-Number Block.

The "upside-down" airplane stamps are among the most recognizable in the world. The rarest of these stamps made headlines around the world when it was auctioned for $2.97 million - a record amount for a U.S. philatelic item.

Then two weeks late, the legendary plate-number block attracted even greater attention when it was exchanged for the 1868 1-cent Z Grill in a one-for-one trade.

Now you can get the insider's story....