Looking at the high points of a major, multi-consignor auction often
reveals many of the same types of rare and expensive coins: 1879 and
1880 Stella gold $4 patterns, rare Carson City and New Orleans Mint
Coronet $20 double eagles, flashy $50 Panama-Pacific International
Exhibition commemorative coins. But looking within the sale often
reveals more about the market, and its depth.
Here is one of my favorite coins that was offered at Heritage’s U.S.
coin auctions held Jan. 3 to 8 at the Florida United Numismatists
convention in Tampa:
1973-S Washington quarter dollar, struck twice on cent planchet,
Proof 68 red and brown
Because they are intended for collectors and placed in special
packaging, errors on Proof coins are rarely encountered. Heritage
offered a 1973-S Washington quarter dollar that was double struck on a
cent planchet, graded Proof 68 red and brown by Numismatic Guaranty Corp.
Collectors’ Clearinghouse author Mike Diamond
identifies a new kind of error.
Also inside this issue, protecting your paper money collection
from mold and advice for participating in online auctions.
Heritage writes, “The high pressure used on proof coinage has
caused this beautifully preserved planchet to spread to cover nearly
the entire quarter-sized surfaces, though a small void remains at the
lower right obverse and corresponding area of the reverse.”
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Some Proof errors made their ways into Proof sets, while others were
clandestinely removed from the Mint. It is curious to think if this
particular error coin was ever once in a six-coin 1973 Proof set since
it is larger than a cent but smaller than a quarter dollar. Its weight
of 3.13 grams is well within the tolerance for a 3.11-gram copper
alloy Lincoln cent planchet of the era.