Numismatic Guaranty Company (NGC) is introducing a new high-security hologram as part of its comprehensive efforts to combat counterfeiting and create a
Sombrilla Magazine Spring 2023 by UTSA - The University of Texas
Holograms on Coins and Beyond - Numismatic News
NGC Coin News
Numismatic Dealer and Company News - CoinWeek
Holography News
QR Codes Can Hide Risky Links, F.T.C. Warns - The New York Times
NGC to introduce a new slab hologram and QR code
Fort Walton Beach Coin Club
1870-S $3 Gold Coin : History & Value.
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