The two different styles of edge reeding found on 2015 tenth-ounce
gold American Eagle bullion coins are variants, not errors, according
to U.S. Mint
officials Jan. 29.
Corp. identified the Narrow Reeds and Wide Reeds edge styles and
published their findings Jan. 21.
Coin World picked up the story and
sought additional information from U.S. Mint officials.
Numismatist Thomas K. DeLorey speculated that the Narrow Reeds edge
variant could have been from the use of a collar from the tenth-ounce
American Buffalo gold bullion coins last struck at the West Point Mint in 2008.
Adam Stump, deputy director of the U.S. Mint's Office of Corporate
Communications, provided a response Jan. 29 on behalf of the Mint
concerning the different edge reeding styles:
"Reeding collars are considered standard tooling," Stump
responded vie email. "Multiple collars were used to produce the
2015 tenth-ounce gold Eagles. The U.S. Mint does not consider the coin
an error, just a variant. There were several thousand of the variant produced."
Still waiting to be answered is how the Mint decides the number of
edge reeds to appear on a reeded edge coin, the actual number of reeds
per Narrow Reeds and Wide Reeds collar dies and why there is not a
standard reed configuration for the collar dies.
Stump said when a collar die reaches the end of its productive life,
the collar die is pulled from service and scrapped.
The collar die is a third die in the coin production process. The
collar die restrains the metal flow created by the striking of a
planchet between an obverse and reverse die. The collar imparts
whatever design comprises the edge device. This could be reeding, a
plain flat surface, or lettering or other ornamentation.
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