Capped Bust Half DollarsLettered Edge (1807-1836)Designer – Engraver: John Reich Metal Composition: 89% Silver – 11% CopperDiameter: 32.5 mm Mass / Weight: 13.48 gramsReeded Edge – 50 Cents on Reverse (1836-1837)Designer – Engraver: Christian Gobrecht Metal Composition: 90% Silver – 10% CopperDiameter: 30 mm Mass / Weight: 13.36 grams