Over the years, those 100 Inverted Jennys have become the most famous and sought-after treasures in the stamp-collecting world ... which would translate to a sale price of nearly $1.6 million.

A Bloomfield Township man secretly owned one of the world ... for sale to collectors, lightly writing on the back of each stamp its original position on the sheet. Bassey’s inverted Jenny ...

The design — which normally shows the "Jenny" Curtiss biplane the right way up — was already important because it was used on the stamps for the ... of 100 so-called "Inverted Jennys" was ...