Bicentennial Quarters were minted at three locations: Philadelphia (no mint mark), Denver (D), and San Francisco (S). Mint marks are located on the obverse (heads) side of the coin, above the date.
The absence of the mint mark on the Type 4 Bicentennial Quarter is a striking mint error, as all proof coins from the San Francisco Mint should bear the "S" mint mark. Mint errors like this are exceedingly rare and significantly increase the coin's value.
Mint errors, such as off-center strikes, double strikes, or missing mint marks, can significantly increase a Bicentennial Quarter's value. Carefully examine each coin for abnormalities.
The condition of a Bicentennial Quarter plays a crucial role in determining its value. Coins in uncirculated or near-perfect condition with minimal wear and scratches are more valuable to collectors.
Some Bicentennial Quarters have rare varieties or design anomalies that make them more valuable. Examples include the Type 1 and Type 2 reverse designs, as well as the "No S" proof variety.
Special silver-clad Bicentennial Quarters were issued in 1976 to celebrate the nation's 200th anniversary. These coins have a 40% silver content and are sought after by collectors for their precious metal value.
Utilize numismatic price guides or online resources to determine the approximate value of Bicentennial Quarters. Keep in mind that values can fluctuate based on factors such as rarity, condition, and market demand.
Consider having valuable Bicentennial Quarters authenticated and graded by reputable third-party grading services. Authenticated and graded coins often command higher prices and provide assurance of authenticity and condition.