The coin in question is a United States half-dollar piece minted in 1964 featuring the portrait of John F. Kennedy. Its composition is 90% silver and 10% copper, giving it intrinsic metal value beyond its face value.
The significance of this particular coin stems from its silver content, as subsequent half-dollars were made with a clad composition, reducing their intrinsic value. It serves as a tangible piece of history, commemorating a pivotal figure in American politics and a turning point in U.S. coinage. Its collectible appeal is driven by its silver content and historical context.