One of the favorite item types in my prehistoric collection is errors of stamps, be they misperforations, colors missing or other odd ducks. In this U.S. color error, the black normally indicating a value and the text for the country of issue is missing. It’s one of those things you love for no other reason than it’s cool – even though other things may be more rare or important.
Missing color error
This U.S. issue designed by James Gurney is one of the most dynamic images of the Tyrannosaurus yet to appear on postage stamps.
The Mesozoic Times 