One of the most valuable errors in numismatics is the 1976 bicentennial quarter struck on a silver dollar planchet. These extremely rare coins, with the wrong composition and size, can fetch prices well into the six figures.
Coins with full torch bands, indicating strong strikes on the reverse, are highly sought after by collectors. A 1976 bicentennial quarter with exceptional full torch bands in high grade can command prices exceeding $100,000.
Complete proof sets of bicentennial quarters, meticulously preserved and graded by reputable grading services, are valued by collectors for their pristine condition and historical significance. A complete set in high grade can be worth several hundred thousand dollars.
Bicentennial silver proof quarters with deep cameo contrast between the design elements and the fields are highly desirable among collectors. A 1976-S bicentennial silver proof quarter graded PR-70 Deep Cameo by PCGS or NGC can command prices well over $50,000.
In extremely rare instances, bicentennial quarters were struck on gold planchets, resulting in unique and valuable error coins. These coins, with the wrong composition and precious metal content, can be worth hundreds of thousands of dollars.
Transitional errors occur when a coin is struck on planchets intended for a different denomination or composition. A 1976 bicentennial quarter struck on an off-metal planchet, such as bronze or aluminum, is a highly prized rarity valued by collectors and can fetch prices upwards of $500,000.
Occasionally, proof coins exhibit error engraving, such as doubled dies or missing inscriptions, adding to their appeal among collectors. A 1976 bicentennial quarter proof with a notable error engraving can be valued at several tens of thousands of dollars.
Pattern strikes are experimental or trial coins struck by the Mint using different designs, compositions, or minting techniques. Bicentennial quarter pattern strikes, particularly those with unique designs or compositions, are rare and highly coveted by collectors, with values reaching into the six figures.