This error coin, struck on a planchet intended for a silver dollar, can be valued at several hundred thousand to over a million dollars, depending on its condition and provenance.
A rare variety featuring doubling on the obverse design, these coins can fetch prices in the hundreds of thousands of dollars for high-grade examples.
Coins struck on gold planchets, although extremely rare, have been known to sell for prices nearing or exceeding a million dollars, especially in top condition.
Complete proof sets with deep cameo contrast between the design elements and the fields can be valued at several hundred thousand dollars, particularly in pristine condition.
Quarters struck on off-metal planchets, such as bronze or aluminum, are rare transitional errors that can command prices in the hundreds of thousands to over a million dollars, depending on their rarity and condition.
Experimental strikes with unique designs or compositions, particularly those with historical significance, can be valued at several hundred thousand to over a million dollars, depending on their rarity and desirability among collectors.
Proof coins with error engraving, such as doubled dies or missing inscriptions, are highly collectible and can be worth hundreds of thousands of dollars, especially in top condition.
Coins struck on planchets intended for nickels, although less common than other varieties, can still fetch prices in the tens of thousands to over a hundred thousand dollars for high-grade specimens.