1870 Gold Dollar. Proof-62 Cameo (PCGS). CAC. A flashy jewel with sandy-gold coloration and strong eye appeal. The fields are considerably reflective and impart strong Cameo contrast against the richly frosted devices. Free of any distracting marks despite a few inconsequential hairlines in the fields.<p>With a mintage of just 35 pieces, the Proof 1870 gold dollar is a challenging rarity among post-war Proof US gold coinage. Many of these were melted, mishandled, or spent, leaving just about 20 examples available for todays collectors. While any example is an important treasure, they are seldom encountered with Cameo contrast, which emphasizes the significance of this offering. <p>