Sarasota's Numismatic Guaranty Co. graded coins that sold at

NGC Rare Coin Wholesalers, a S.L.Contursi Company

Catalog, Live Auction - Apr 13th San Francisco Spring Coin Auction-14988 by Gold Standard Auctions

Gold coin certified by Sarasota company sells for over $2 million

Understanding Grading & Certification

Sarasota's Numismatic Guaranty Co. graded coins that sold at auction for nearly $9M

Numismatic Guaranty Corp. authenticates coin minted by Caesar's assassin

Karamitsos Sale Features PMG-certified Specimen Note from Greece

NGC Grades 45 Million Coins

Sarasota's Numismatic Guaranty Co. grades 'Hawaii Five-O' coin that sells for $4M

NGC Certifies Kendall 1861 Confederate Half Dollar