These particular United States coins, minted in or before 1964, are comprised of 90% silver. Dimes, quarters, and half-dollars produced during this era contain a significant quantity of the precious metal, making them distinct from their later counterparts which are composed of clad metals. For example, a 1964 Kennedy half-dollar contains 0.36169 troy ounces of silver.
Their inherent silver content provides intrinsic value, offering a hedge against inflation and economic uncertainty. This characteristic has made them attractive to investors and collectors alike. Furthermore, these coins serve as tangible reminders of a bygone era in American numismatic history, representing a period when silver coinage was commonplace.