Archive: People and Markets
PMG Grading On-site Service at the HKINF
NGC Hong Kong will accept PMG on-site grading submissions and will offer free paper money evaluations at the Hong Kong International Numismatic Fair (HKINF), on December 11-13, 2023.
Stack’s Bowers Moves Into New Hong Kong Office
Stack’s Bowers Galleries has relocated their Hong Kong headquarters. The new space is larger with a state-of-the-art auction facility. Opening will take place on October 11.
Archive: Coins, Medals and more

State-of-the-Art Minting Technology
Colours, special shapes, inlays, micro inscriptions, latent images and holograms – many technologies are used on commemorative coins today. In this article, we give you a little overview of the different technologies that are currently applied in the coin producing industry.

Counterfeit Detection: Altered Prussia 20 Mark
An NGC expert gives us insight into his everyday life. He shows how the year on a coin from the German Empire was altered by a coin doctor.










Striking Designs – Exhibition at the Dumbarton Oaks
A new special exhibition is on view at the Dumbarton Oaks Museum in Washington D.C. „Striking Designs: Communicating Through Coins” explores what the images on coins can tell us about the late Roman and Byzantine empire.
An “Error Coin” No Collector Is Happy About
The quality of the country’s collector coins is the subject of heated debate in Germany. This regards silver coins and colour issues. But the problem is not limited to German mints – the phenomenon of “milk spots” in particular is a major concern for coin producers around the world.