21 Early in 2017 it was reported that Us Coin error specialist Ken Potter had confirmed the discovery of a unique 1982 Denver minted small date Lincoln penny coin. It caused […] Copper Transitional Lincoln Cents Sell for Over $35K at AuctionAugust 15, 2017 in Auction Reports / Uncategorized / Unites States Mint tagged ngc / pcgs / US Mint / usa by Numisman