1866 Cameo Proof Indian Head Cent. The surfaces of this scarce cameo proof near-Gem are deeply mirrored with delightful purple-gold and cyan highlights in the fields. The devices show significant portions of mint frost, thus giving the coin noticeable cameo contrast. Although the official mintage is 725 coins, the exact number struck is unknown. Early die states of this issue with cameo contrast are quite rare with only 8 such pieces certified by NGC.