The listing, Unique "Dummy" Stamp (For Testing Purposes Only) Includes Individual Stamp Mount has ended.
The US Bureau of Engraving and Printing (BEP) and most private sector printers of stamps have long produced dummy/testing material to check out their printing presses and other stamp manufacturing equipment.
Such printings are primarily intended for internal use and are not regularly available outside the printing facilities.
See front, backside & 3rd photo is the stamp INSIDE the black mount and I will send the winner a clear sleeve as well.
Fantastic addition to any collection!
The dummy stamp up for auction has faint horizontal red "defacement" lines through it.
This interesting philatelic item has intrinsic and collectible value and makes an attractive addition to a Coil, Back of the Book or General Stamp Collector.
Free shipping within in the USA from an odor free home.