Kennedy Half Dollar coin 1776 to 1976

The 1776-1976 Bicentennial Half Dollar, also known as the Kennedy Half Dollar with the Bicentennial design, was a special commemorative coin issued by the United States Mint to celebrate the 200th anniversary of American independence.

Here are its specifications:

 * Description:

   * Obverse: Features the familiar left-facing portrait of President John F. Kennedy, designed by Gilroy Roberts. Around the upper rim is "LIBERTY," and around the lower rim are the dual dates "1776-1976." The motto "IN GOD WE TRUST" is also present, and the initials "GR" (for Gilroy Roberts) are found below Kennedy's truncated neck. Mint marks (D for Denver, S for San Francisco, or no mint mark for Philadelphia) appear on the obverse.

   * Reverse: Depicts a frontal view of Independence Hall in Philadelphia, where the Declaration of Independence and U.S. Constitution were debated and adopted. "UNITED STATES OF AMERICA" is inscribed around the top rim, and "HALF DOLLAR" around the bottom. To the left of Independence Hall are the words "200 YEARS OF FREEDOM," and to the right is the motto "E PLURIBUS UNUM." The designer's initials "SGH" (for Seth G. Huntington) are under "E PLURIBUS UNUM."

   * Edge: Reeded.

 * Composition: There were two primary compositions for the 1776-1976 Bicentennial Half Dollars:

   * Circulating (Business Strike) Coins: These were made of a copper-nickel clad composition. This consists of an outer layer of 75% copper and 25% nickel bonded to a pure copper core.

   * Collector's Versions (San Francisco Mint "S" mint mark): A special 40% silver version was also produced, primarily for collectors (both proof and uncirculated sets). These coins consisted of an outer layer of 80% silver and 20% copper clad to a core of 79% copper and 21% silver, resulting in a net composition of 40% silver and 60% copper.

 * Weight (Mass):

   * Copper-Nickel Clad: 11.34 grams

   * 40% Silver Clad: 11.50 grams

 * Height (Thickness): 2.15 mm

 * Length (Diameter): 30.61 mm