1964 Roosevelt Dime Silver Composition
.Mintage: 933,310,762
.Minted at: Philadelphia (No Mint Mark)
.Designer/Engraver: John R Sinnock
.Metal Composition: 90% Silver - 10% Copper
.Finesse: .900
.Diameter: 17.9 mm
.Mass/Weight: 2.5 grams
.Thickness: 1.1 mm
.Variety/Rarity: Philadelphia/Type 1 (Silver)