Juan Cayón Jr is Managing Director of the coin dealership Cayón Subastas in Madrid. In 2005 he took over the company from his father. Before dedicating himself completely to the coin trade, he worked as a corporate lawyer and expert in that field.
After completing law school, Michael Hardmeier discovered his passion for numismatics at SINCONA AG in Zurich. Ever since, he has been a member of the company’s managing board working across all lines of business.
Harvey Stack was born into the rare coin business and grew up in a family of coin dealers. He worked in the coin trade and as an auctioneer for over 70 years, building numerous important collections and advocating for the coin trade and collectors.
Jürg Richter is a numismatist and a specialist in all Swiss coins, banknotes and shooting medals. He founded SINCONA AG in Zurich in 2011 and has been managing it ever since.
Klaus Vondrovec is numismatist and director of the Vienna Coin Cabinet. In addition to his research on ancient coins and museum tasks, he is particularly interested in attracting a wide audience to numismatics.
Shouyuan Zhou is the founder and CEO of Shouxi.com, China’s arguably most important numismatic website. He is Executive Consignment Director of China at Stack’s Bowers and a co-founder of the Hong Kong Coin Show.
Nirat Lertchitvikul is Director of Asian Operations at Stack’s Bowers & Ponterio, Ltd. He became a full-time numismatist in 1979 and is an expert in Asian coins and medals. Since 2016 Nirat Lertchitvikul has been one of the four organizers of the Hong Kong Coin Show.
Frida Ehrnsten is a Finnish archaeologist and numismatist. She is curator at the National museum of Finland in Helsinki, where she mainly deals with new coin finds and with creating a digital collection.
Alastair Willis is archaeologist and Senior Curator of Numismatics and the Welsh Economy at the National Museum of Wales. In his research he focuses on the monetary history of Wales, and he assists Welsh Finds Liaison Officers with numismatic enquiries.
Andrea Casoli is a Swiss numismatist and has been working as a curator at the coin cabinet of the Basel Historical Museum since 2020. He mainly works on ancient coinage and the monetary history of Switzerland.
