1964 Kennedy Half Dollar 90% Silver Composition
.Mintage: 277,254,766
.Minted at: Philadelphia (No Mint Mark)
.Designer/Engraver: Gilroy Roberts/Frank Gasparro
.Obverse Lettering: LIBERTY, IN GOD WE TRUST, 1964
.Obverse Designer: Gilroy Roberts
.Reverse Lettering: UNITED STATES OF AMERICA, HALF DOLLAR
.Reverse Designer: Frank Gasparro
.Metal Composition: 90% Silver - 10% Copper
.Finesse: .900
.Diameter: 30.61 mm
.Mass/Weight: 12.5 grams
.Thickness: 2.15 mm
.Variety/Rarity: Philadelphia/Type 1, 90% Silver