United States quarters produced in 1964 hold a significant quantity of the precious metal. The specific proportion of silver within these coins is 90%, with the remaining 10% comprised of copper. This composition distinguishes them from later coinage.
This high silver content provides these particular coins with intrinsic value that exceeds their face value. This characteristic makes them of interest to collectors and individuals seeking to invest in precious metals. The historical context of their production further enhances their appeal, connecting them to a period when circulating coinage contained substantial precious metal content.