1964 Kennedy Half Dollar 90% Silver Composition
.Mintage: 277,254,766
.Minted at: Philadelphia (No Mint Mark)
.Designer - Engraver: Gilroy Roberts
.Metal Composition: 90% Silver - 10% Copper
.Finesse: 0.900
.Diameter: 30.61 mm
.Mass / Weight: 12.5 grams
.Thickness: 2.15 mm
.Variety/Rarity: Philadelphia/Type1 (90% Silver)