CCG to Open London Office in April 2018
Authenticated Stamp Guaranty
CCG launches ASG, an expert and impartial grading service for collectible stamps.
Numismatic Conservation Services
NCS provides professional conservation services for public and private collections of coins, tokens and medals.
Finest known copy of Action Comics #1 CGC Graded 9.0 sells for record $3.2M on eBay.