Ma Tak Wo PCGS expert

Ma Tak Wo

Ma Tak Wo Numismatic Co. Ltd. – Managing Director

Expertise and Specialties: All Chinese coins, banknotes and medals

Ma Tak Wo has been a major player in the Asian numismatic scene for more than three decades, first as an avid collector of Chinese coins (including Hong Kong and Macau) and paper money, and then as one of the principals of the Taisei group of companies, which organized the highly successful Hong Kong and Singapore coin shows and auctions. In 1999, he set up the company bearing his name to take over the Hong Kong and Singapore Coin Auctions, as well as dealing in rare coins and banknotes of the world and publishing numismatic books. As a principal cataloguer and auctioneer of the two auctions, an enormous number of Asian numismatic rarities have changed hands under his hammer. The company also runs the biannual Hong Kong International Coin Convention & Antique Watch Fair.

During his busy career, Ma has managed to find time to publish numerous articles in numismatic journals and author or edit the following numismatic titles which have become standard references in their respective fields including

  • Currency of Macau (1987)
  • Struck Copper Coins of Sinkiang (1988)
  • Illustrated Catalogue of Sinkiang Gold & Silver Coins (1988)
  • Illustrated Catalogue of Chinese Gold & Silver Coins-Ching & Republican Issues, 1st to 7th Edition (1993-2012)
  • Illustrated Catalogue of Hong Kong Currency, 1st to 8th Edition (1995-2013)

Mr. Ma has been the elected President of the Hong Kong Numismatic Society from 1986 to date and was appointed Advisor to the Chinese Numismatic Society in 2008. In sum, Ma Tak Wo is a world-renowned authority on Chinese numismatics and a respected numismatist dedicated to providing professional services to the collectors. He may be contacted at [email protected].

ZUO Jinghua PCGS Expert

ZUO Jinghua

Beijing ChengXuan Auctions Co., Ltd. – Managing Director

Expertise: All Chinese Coins

Specialty: Ching Dynasty Provincial Coins, Republic of China Gold and Silver Coins and Sycees

Ms. Jinghua Zuo is a renowned expert in Chinese coins and stamps and a leading figure in the Chinese coin and stamp market. She has over twenty years of solid experience in the coin and stamp auction business, beginning with China Guardian Auction Company in November 1995. Ms. Zuo was the manager of Coins & Stamps Department at China Guardian and Beijing Huachen before she established Beijing ChengXuan Auctions Co., Ltd. in 2005. In her role as the Managing Director, she is the person-in-charge of ChengXuan’s Coins & Stamps Department.

Ms. Zuo has made significant contribution to the Chinese coin market during her over twenty years in the industry. With her professionalism and solid operational experience, she manages to cope with all industry issues big and small, and guide her company and customers through the ups and downs in the coin and stamp market.

Ms. Zuo can be contacted at [email protected]. Check out her company at

SUN Keqin PCGS expert

SUN Keqin

Expertise: Chinese coins

Specialties: Chinese circulating coins, including all varieties and highest grades. Academic research.

Keqin Sun is the recognized authority on modern circulating Chinese coins. He became a coin collector in 1990, collecting Chinese commemorative coins, milled silver coins, and modern gold and silver coins, as well as modern notes. Since 2006, he has concentrated on collecting and researching proof circulating coins. He has authored Catalog of Chinese Proof Ordinary Commemorative Coins. In 2008, his research focused on the varieties of circulating coins and he authored Treasures Catalog of Chinese Ordinary Commemorative Coins. In 2012, he undertook a comprehensive study of circulating coins and authored Standard Catalog of Chinese Modern Circulating Coins, including all the Chinese modern coins. Kegin Sun’s reference books are used by PCGS as the definitive guides to the modern Chinese circulating coins market.

Keqin Sun founded Modern Chinese Coins Web in 2010. The website centralizes the world’s top experts in Chinese circulating coins to jointly promote and conduct comprehensive research on modern circulating coins. The auction prices shown on the website are the real market price of Chinese modern circulating coins.

Keqin Sun is the executive director of Beijing Numismatic Society, and an academic committee member of Shanghai Finance University Modern Coins Institute. A famous professional collector and businessman, he also serves as a coin appraiser,and a moderator and consultant to many coin collecting websites. Mr. Sun may be contacted at [email protected].<input type='hidden' data-resx='true' value='wordPeriod'></input>

Chen Hao Min PCGS expert

Chen Hao Min

Expertise: Chinese Coins

Specialties Chinese modern gold and silver coins

Chen Haomin has been collecting coins for 30 years now, starting out when he was just 12 years old. He collects Chinese coins of all dynasties and contemporary/modern world currencies. He founded his coin shop Guang Ying Ge in 1994. Guang Ying Ge is a top market-maker for Chinese modern gold and silver coins. Mr. Chen has devoted his time to collecting and studying Chinese precious metal commemoratives issued prior 2000, also known as old, exquisite, rare coins². He works closely with banks and property developers to host coin expos and seminars, and he has been frequently seen on newspaper and TV promoting coin collecting to the public.

Mr. Chen can be contacted at [email protected] or .

Jean Lecompte PCGS expert

Jean Lecompte

Expertise: French colonial coins, patterns and medals

Specialties: coins of Indochina, colonial French Anam, Cambodge, Laos, Vietnam, Cochenchina, Indochina Tonkin and French concessions in China.

Jean Lecompte is the renowned author of the major reference book on French colonial coins and patterns, Monnaies Jetons des Colonies Francaises (editions Gadoury 2007), and a recognized expert the French colonial coins of Indochina. His standard reference was revised in October, 2013 with updates on Indochina, colonial French Anam, Cambodge, Laos, Vietnam, Cochenchina, Indochina Tonkin and the French concessions in China.

Jean Lecompte has been a collector French Colonies since he was 10 years old, and a professional numismatist since 1980. He is a Life member of ANS, ANA, and a member of the Societe Numismatique Asiatique, as well as a consultant for large collectors and auctioneers around the world.

Jean lives in the Southern part of France in a property surrounded by olive trees and basins with carps koi. Jean may be contacted at [email protected].

Nirat Lertchitvikul PCGS expert

Nirat Lertchitvikul

Director of Asian Operations ( Stack's Bowers & Ponterio, Ltd.)

Expertise: Asian coins and medals

Other Areas: US, China, Straits Settlements, Korea, Japan, Thailand, Cambodia, Burma/Myanmar

Nirat Lertchitvikul has been a major force in the Asian coin and paper money market since becoming a full-time numismatist in 1979. He has traveled extensively, seeking rarities from China, Hong Kong, Thailand, Straits Settlements, Korea, and other Asian countries, aided by his vast numismatic knowledge and his ability to communicate fluently in several languages.

Mike Sargent PCGS expert

Mike Sargent

Director of Grading, Professional Coin Grading Service (PCGS)

Expertise: U.S. and World counterfeit coins

Other Areas: U.S. gold coins, U.S. Territorial gold coins, Chinese coins

Mike Sargent is the Director of Grading at PCGS and is considered one of the world’s authorities on counterfeit detection in both US and World coins. He maintains a large database of known counterfeits and is constantly looking for new pieces to add. Since joining PCGS in 1989, Mike has personally graded over 8 million coins (including over 200,000 Chinese coins) for PCGS and is considered one of the top grading experts in the world.