United States Coinage
To first learn where doubled dies are formed, one must first know how dies in the United States Mint are created. Before 1997, a die was made by hubs that contained the raised design elements that were intended to appear on the coin. The blank dies were heated (to soften them) and then were pressed against the hubs to transfer the design from the hub to the striking die. In every case, one impression was not enough to transfer the design elements from the hub to the die, so multiple impressions were required to transfer enough of the design. For this reason, after the first impression was made, the die was reheated and prepared for a second impression. The mint workers would use guides to align the hub and the working die perfectly to prevent overlapping, or a doubled die. It is when mint workers failed to align dies properly during this process that doubled dies were produced. In many instances three to four impressions were required, which could but rarely led to tripled and quadrupled dies.
Modern coining methods have vastly reduced the frequency of these varieties due to the use of a single squeeze hubbing method during die creation, but doubled dies in modern United States coinage are still occurring. With the new die making process, implemented after 1996, dies only required one impression of the hub to transfer all of the design from the hub to the die. But it has been discovered that the pressure created is so great, that some dies tend to slightly rotate during this process.
Modern doubled dies in American coinage are being discovered mainly in Lincoln cents. The 2004 Peace Reverse Nickel shows doubling in the date, motto, designer initials and eyelid of Thomas Jefferson. The 2005 Bison Reverse Nickel, shows slight doubling in the word "Liberty" and in other devices of the coin.
Read more about this topic: Doubled Die
Famous quotes containing the words united states, united, states and/or coinage:
“It is a curious thing to be a woman in the Caribbean after you have been a woman in these United States.”
—Zora Neale Hurston (1891–1960)
“In one notable instance, where the United States Army and a hundred years of persuasion failed, a highway has succeeded. The Seminole Indians surrendered to the Tamiami Trail. From the Everglades the remnants of this race emerged, soon after the trail was built, to set up their palm-thatched villages along the road and to hoist tribal flags as a lure to passing motorists.”
—For the State of Florida, U.S. public relief program (1935-1943)
“Action from principle, the perception and the performance of right, changes things and relations; it is essentially revolutionary, and does not consist wholly with anything which was. It not only divides States and churches, it divides families; ay, it divides the individual, separating the diabolical in him from the divine.”
—Henry David Thoreau (1817–1862)
“Designs in connection with postage stamps and coinage may be described, I think, as the silent ambassadors on national taste.”
—William Butler Yeats (1865–1939)