The following mint errors are featured in the following upcoming Heritage Auctions:
January 8-13, 2020 FUN US Coins Signature Auction #1311
January 12-13, 2020 NYINC World & Ancient Coins Signature Auction #3081
January 21, 2020 World & Ancient Coins Signature Internet Auction #3082

Victoria Mint Error - Broadstruck Gold 1/2 Sovereign 1869 AU58 PCGS

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1918 Buffalo Nickel -- Struck on a Silver Dime Planchet -- AU58 PCGS

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1921 Morgan Dollar -- Double Struck in Collar -- AU58 PCGS

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George V Lead Uniface Obverse Die Trial 1/2 Sovereign (1911) MS63 NGC

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1983 Lincoln Cent -- Transitional, Struck on a Bronze Planchet -- MS61 Red and Brown NGC

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George IV Platinum Proof Pattern Mule Farthing 1825 PR60 PCGS

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1999-P SBA Dollar -- Struck on a Sacagawea Dollar Planchet -- MS66 PCGS

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2000-P Sacagawea Dollar -- Double Struck on Aluminum Scrap -- MS65 PCGS

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1999-P Delaware Quarter -- Struck on an Experimental Planchet -- MS66 PCGS

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1942 Walking Liberty Half -- Struck on a Silver Quarter Planchet -- MS65 PCGS

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Washington Quarter, Flanagan Reverse -- Struck on a Cent Planchet -- PR62 Red NGC

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Franz Joseph I Mint Error - Obverse Brockage Gold 4 Ducat ND (1872-1915) MS65 PCGS

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Victoria Proof Mule 4 Pence 1862 PR65 PCGS