1883 Liberty Seated Half Dollar. Proof-66 (PCGS).Blended copper-gray and olive-russet patina to both sides, the surfaces with more vivid undertones evident as the coin rotates under a light. Silky smooth in appearance, and uncommonly well preserved for a survivor of this 1,039-piece Proof half dollar issue.PCGS Population: 13; 6 finer in this category (Proof-67 finest).