Several visually dramatic error coins performed strongly at the 2017 FUN auctions, including a 1921-S Morgan dollar struck 20 percent off center. Graded MS-63 by PCGS it brought $16,450.

Major striking errors on Morgan dollars are rare, and this example included a full date and San Francisco Mint mark. Heritage wrote, “The pearl-gray and almond-gold surfaces appear unabraded and exhibit vibrant luster,” adding, “Because the collar die was present, the dies were able to closely approach, and the strike is full on the wreath, as seldom seen for the issue.” For comparison, Heritage sold a dateless 1921-S Morgan dollar struck 25 percent off-center graded MS-62 by PCGS for $14,375.

Morgan dollar: For decades the Morgan dollar has ranked at the top U.S. coin collectors' favorite coins. Why is the Morgan dollar so popular? There are many reasons, including: large size, attractive designs, numerous varieties, historical significance. How much are Morgan dollars worth?

Major striking errors on Proof coins are very rare because Proof coins are manufactured with special care by the U.S. Mint and the coins are packaged for sale as sets, providing another check against mistakes leaving the Mint. Those that manage to escape are sought after by collectors.

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Heritage offered a 1958 Washington quarter dollar graded Proof 62 by PCGS with a full first strike brockage of the obverse on the reverse. On its production Heritage explains, “The present coin was struck between the obverse die and the obverse of a previously struck coin. The reverse side is a perfect brockage of the obverse design: reversed and incused, without any distortion, expansion, or incompleteness.” The result is a coin that has two impressions of the obverse design — though one is sunken and reversed. Few Proof brockages have left the U.S. Mint and the impressive error sold for $12,337.50.

Washington quarter: The Washington quarter dollar, which has been circulating since 1932, was born out of the Treasury Department's desire to produce a coin to mark the bicentennial of the birth of the first president of the United States. How much are Washington quarters worth?

Leading the error offerings was a well-publicized PCGS MS-69 2014 American Eagle 1-ounce gold $50 bullion coin struck on a .9999 fine 1-ounce gold planchet intended for the American Buffalo 1-ounce bullion coin that brought $23,500. Another wrong-planchet error, an NGC MS-64 1977-D Eisenhower dollar struck on a copper-silver clad planchet intended for San Francisco Mint Bicentennial Eisenhower dollars, sold for $17,625, a marked improvement from the $12,925 it realized in a February 2014 Heritage sale.

More 2017 FUN Auction Coverage:

FUN 2017: The two classic-date coins that brought the same exact price: The breadth of Heritage’s FUN auctions meant that collectors had a wide-range of choices if they were looking for a key date to add to their sets.

Recapping the diversity at Heritage’s 2017 FUN sale: Heritage’s 2017 Florida United Numismatists convention auctions realized more than $42 million across more than 8,000 lots in its U.S. coin sessions.