The item in question is a United States half dollar coin struck in 1976 to commemorate both the bicentennial of the American Declaration of Independence and John F. Kennedy. These coins feature a dual date of 1776-1976. Instead of the usual depiction of Independence Hall, the reverse side shows Independence Hall in Philadelphia.
This commemorative coin holds significance for several reasons. It marks a crucial historical milestone for the United States. Coins struck for circulation in 1976 are clad coins made of outer layers of 75% copper and 25% nickel bonded to a core of pure copper. Also a limited number of silver coins were produced, with a composition of 40% silver. These silver versions are valued both for their precious metal content and as numismatic collectibles. The historical context, combined with the potential for silver content, makes these coins of interest to collectors and investors.