Proof 1776-1976 S Bicentennial Quarter
Double Struck on Struck Roosevelt Dime
PCGS PR 67 CAMEO
Unique Discovery Coin
By Mike Byers for Mint Error News ……
This is the only known Proof Bicentennial Quarter double struck over a struck dime. It is also the only known double struck U.S. Proof coin overstruck on any struck coin.
The 1976 Proof Bicentennial Quarters were struck at the San Francisco Mint. 1976 Bicentennial off-metal mint errors are very rare in every denomination struck for circulation. But in Proof, they are prohibitively rare with only four Proof Bicentennial off-metal double denominations known on any denomination. There are two Bicentennial Proof quarters struck over struck cents known. There is a just-discovered and unique 1976-S Bicentennial quarter struck over a struck 1967 dime. And now this new discovery of a 1976-S Bicentennial quarter double struck on a struck dime.
This unique discovery mint error cannot be compared to previous sales and auction records but here are a few related mint errors to give an idea on its rarity and value.
In a Heritage auction, an NGC Mint State 64 Bicentennial quarter on a dime blank sold for $6,900 USD. Also in a Heritage auction, a Bicentennial quarter struck on a struck dime in PCGS Mint State 62, sold for $9,200. Jon Sullivan, a coin dealer specializing in mint errors, sold the only known Bicentennial quarter struck on a dime blank in PCGS Proof 67 in the low five-figure range.
Proof coins are struck by technicians who hand feed the blanks into special presses. They are produced, examined, and packaged using extreme quality control. It is very unusual to find major Proof errors. A few broadstrikes, off-centers, double strikes (in collar), and off-metals have been found in sealed Proof sets. Proof errors are aggressively sought after by many error collectors.
A small group of Proof errors recently came from a collection that was auctioned by the State of California. The United States Secret Service inspected and released this collection to the State of California determining that it was legal to own. The State of California then auctioned the collection and it has been dispersed since the sale.
The unique mint error offered here was just discovered and was authenticated and certified Proof 67 by PCGS. It was preserved in amazing condition, with phenomenal detail remaining from both of the quarter die strikes. There is some detail remaining from the original dime design, which is noticeable underneath the two quarter strikes. I’ve never seen a Proof overstruck coin with anywhere near this amount of detail creating a visually stunning and incredible multiple mint error.
This discovery mint error is fascinating since it combines rarity (unique), quality (Proof 67), history (Bicentennial one-year-only design), and spectacular eye appeal and detail from the strikes. This enigmatic and unique U.S. Proof mint error belongs in a major collection of the finest error coins or in a collection of Bicentennial coins.
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