A United States quarter dollar coin produced in 1966 that contains silver is the subject of discussion. Quarters minted in the United States before 1965 were composed of 90% silver and 10% copper. Therefore, identifying whether a 1966 quarter contains silver is critical because the U.S. Mint transitioned to a clad composition (copper-nickel) in 1965. Any 1966 quarter dollar containing silver would be an error coin.
The presence of precious metal significantly elevates the coin’s value beyond its face value. The intrinsic value of the silver content surpasses the nominal value. Furthermore, such an error coin, exhibiting a composition deviating from the intended clad material, holds considerable appeal for collectors and numismatists due to its rarity and potential historical significance. The existence of such a coin is subject to authentication and verification.