These NGC John Mercanti Signed White Core Flag Labels are the most sought after for any collection. These beautiful American Silver Eagles are certified and graded by NGC (Numismatic Guaranty Corporation). The grade is PF70 (Proof 70) which means the coin is completely flawless. Ultra-Cameo is designated for Proof coins based on their fully frosted design and highly reflective fields on the obverse and reverse, giving it a pleasant visual contrast. NGC is a highly respected grading company and one of the largest in the United States.