U.S. #1374a Tagging Omitted
6¢ John Wesley Powell
Issue Date: August 1, 1969
City: Page, AZ
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
Color: Black, ocher and light blue
This stamp honors John Wesley Powell, who was the first white man to explore the Green and Colorado Rivers when he made the perilous journey along a 1,000-mile stretch of the Grand Canyon.
John Wesley Powell Explores the Grand Canyon
John Wesley Powell, a one-armed Civil War veteran, led two geographic explorations down the Colorado River and through the Grand Canyon. On May 24, 1869, 10 men in four boats embarked on a journey that covered almost 1,000 miles through uncharted canyons. Three months later only 6 of the company emerged from the depths of the Grand Canyon. In 1871-72, Powell led a second expedition through the Grand Canyon. This expedition was much more successful – producing the first accurate maps of the area, and over 100 photographs.
Now you can own this stamp with rare tagging omitted. Did you know a stamp missing its phosphorescent tagging is considered by many to be similar to a missing color error? The good news is that unlike some error stamps, untagged error stamps are affordable.
What is Phosphorescent Tagging and Why is it Important?
Tagging of U.S. stamps was introduced in 1963 with airmail stamp #C64a. It helps the U.S. Post Office use automation to move the mail at a lower cost. A virtually invisible phosphorescent material is applied either to stamp ink or paper, or to stamps after printing. This “taggant” causes each one to glow in shades of green (red on older airmails) for a moment after exposure to short-wave ultraviolet (UV) light. The afterglow makes it possible for facing-canceling machines to locate the stamp on the mail piece, and properly position it for automated cancellation and sorting.
Some stamps have been printed with and without tagging intentionally, but when tagging is omitted by accident, we collectors are treated to a scarce modern color error. Our stamp experts examined thousands of stamps to find these just for you. Now you can easily give your error collection a boost or explore this fascinating new area of collecting. Quantities are limited, so order your untagged error stamp right away.
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