unc or unk or UN - abbreviation for uncirculated.
uncirculated or un-circulated - a new condition coin that does not have any sign of wear. Marks on the coin that may come from the manufacturing process do not keep a coin from being un-circulated. (Example, bag marks.) Even the slightest amount of wear or cleaning will keep a coin from grading uncirculated.
upsetting mill - machine used in coin production to raise the rim on both sides of a blank (planchet). A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
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