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Meet our expert: Win Callender

Senior Consignment Director
1-877-HERITAGE (437-4824)  x1415

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Win Callender has joined Heritage Auction Galleries as a professional numismatist and consignment director. A lifelong numismatist - he found a 1770 Russian 5 Kopek when he was just 5 years old - Callender parlayed his hobby into a fulltime business when he was in his mid-30s, starting his own business in Broken Arrow, Okla., in 1993. He subsequently worked for Carter Numismatics and David Lawrence Rare Coins, working his way up to Vice President in both firms. Win has been a life member of the American Numismatic Association since 1993. He is married with two children.

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Meet our consignment experts

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David Mayfield
Coins

Vice President - Heritage Auctions
1-800-USCOINS (872-6467)  x1277

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David Mayfield is a Vice President at Heritage Auctions. David started collecting coins at the age of nine and has been trading at coin shows since he was ten years old. David became a full time coin dealer in the early 80's, and has been a regular on the national and international coin show circuit ever since. David came to work at Heritage Auctions in 1992, and since has had the pleasure of assisting thousands of collectors in building their collections and ultimately in helping them bring their collectible legacy to market. David oversees Heritage Auction's numismatic consignment division, and works with collectors and Consignment Directors across all of Heritage Auction's collectible categories.

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Jim Stoutjesdyk
Coins

Vice President of Numismatics
1-800-USCOINS (872-6467)  x1310

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Jim Stoutjesdyk was named Vice President of Heritage Rare Coin Galleries in 2004. A native of Michigan, Jim has been actively involved in numismatics since a young age and the American Numismatic Association named him their Outstanding Young Numismatist of the Year in 1987. After graduating from the University of Michigan he was employed by Superior Galleries in Beverly Hills, California where he eventually became their Director of Collector Sales.

Since coming to Heritage in 1993, Jim has assumed a wide variety of responsibilities. He initially was hired as the Gallery Manager for Heritage's retail showroom. For several years he helped to develop Heritage's retail clientele and placed millions of dollars worth of rare coins with collectors. Jim's talent for writing and passion for numismatics led him to become the editor of Heritage's Insider magazine. From 1998 to early 2000 this bi-monthly publication brought collectors the latest offerings from Heritage's inventory and featured a wide variety of informative articles. With the rapid development of Heritage's web site and instant access to our inventory, the Insider magazine was phased out. Jim's interest turned to wholesale trading and he quickly became a familiar face at coin shows across the nation. As Vice President, Jim's duties include buying and selling millions of dollars worth of rare coins each month, pricing all of the new coins available for sale each day, and overseeing the daily operations of the rare coin department.

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Cristiano Bierrenbach
Coins

Executive Vice President of International Numismatics
1-800-USCOINS (872-6467)  x1661

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Cristiano Bierrenbach started trading coins in his native Rio de Janeiro at the age of seven before founding his own successful numismatic business. In 1996, he established one of the first numismatic shops on eBay and later became the youngest Technical Director of the Brazilian Numismatic Society at the age of 30. Cristiano joined Heritage and moved to the United States in 2007. Under his leadership, Heritage World and Ancient Coins auction sales grew steadily from $12.8 million in that year to $41.5 million in 2011, the year he became a partner. Cristiano developed the market for Heritage online-only automated auction venues, which today feature more than sixty events per year. In World Coins alone, these auctions exceed $12 million annually. Since 2015, Cristiano has been at the forefront of Heritage’s international expansion into Europe and Asia, and will continue to expand the company’s international footprint in the future.
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Roxana Uskali
Coins

Director of Numismatics, Chicago
1-800-USCOINS (872-6467)  x1282

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Roxana Uskali, the Director of Numismatics for Heritage Auctions’ Chicago office, started collecting coins like many of you — as a youngster who frequented a local coin and stamp shop in her neighborhood. She went on to graduate cum laude from Loyola University Chicago, receiving degrees in world history, theology, and piano performance before pairing her diverse academic background and her love of traveling into a career in professional numismatics. Roxana spent nine years working as the principal world coin numismatist for the prestigious Chicago firm Harlan J. Berk, Ltd., and more recently her own company, KRCoins. Over the last several years, she has helped catalog Heritage’s world coin auctions while also frequently attending major coin shows around the U.S. and abroad. In addition to being a member of the ANA, the IBNS, and the CSNS, Roxana also produces coin-related videos called Coincasts.
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Warren Tucker
Coins

Vice President, Heritage World Coin Auctions
1-800-USCOINS (872-6467)  x1287

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Warren Tucker has been a full-time coin dealer since 1964. In 1968, he joined Jack Boozer and Doug Weaver in business in Waco, Texas, where he first met Steve Ivy. Warren later moved back to Georgia, where he became a partner with John Hamrick at WorldWide Coin Investments of Atlanta. During the 1970s, Warren began more extensive travel throughout Europe and Asia to buy coins. In 1979, he first joined forces with Steve Ivy, opening an office in Atlanta. Associations with Richard Nelson and Ronald J. Gillio followed thereafter.
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Dustin Johnston
Coins

Vice President
1-800-USCOINS (872-6467)  x1302

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Dustin Johnston joined the Heritage team in 1998 and has been active in nearly every aspect of the business. He was born and raised in Tucson, where he also attended the University of Arizona. Prior to joining Heritage, he won a number of literary and exhibiting awards from the ANA. Dustin also served as an Exhibit Judge and Numismatic Theater Speaker for the ANA. He oversees the management of the Currency division including consignment acquisitions, purchasing, cataloging, and inventory management. He is a member of the PNG, ANA, IBNS, SPMC, and currently serves as Vice President for the Professional Currency Dealers Association. Away from work, he enjoys married life, his two young kids, and WWI research related to the 364th Infantry.

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Sam Foose
Coins

Consignment Director & Auctioneer
1-800-USCOINS (872-6467)  x1227

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Sam Foose joined Heritage Numismatic Auctions, Inc., in 1993 as an Auction Coordinator. He rose to Assistant Auction Director in 1998, and began calling auctions. After a stint serving as a Senior Manager and Consignment Director in other collectible fields, he returned to Heritage in 2002 as a Consignment Director to help Heritage's expansion into other collectibles fields. Besides calling auctions as one of Heritage's primary auctioneers, he travels the nation assisting clients who wish to liquidate their collections of coins, paper money, decorative arts, and sports collectibles.
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Jason Friedman
Coins

Consignment Director
1-800-USCOINS (872-6467)  x1582

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Jason's interest in rare coins, which began at 12 and expanded into his own numismatic business, allowed him to pay for most of his college tuition at the University of North Texas, from which he graduated in 2005. He joined Heritage soon after. He is a member of the American Numismatic Association (ANA) and Florida United Numismatists (FUN).
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Kenneth Yung
Coins

Director of Asian Operations
1-800-USCOINS (872-6467)

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Kenneth Yung joined Heritage Auctions as Director of Asian Operations after building a career in numismatics as one of the most active dealers in the Hong Kong and China markets. In addition to accepting consignments for upcoming Heritage auctions, he will be responsible for all Hong Kong office operations. Kenneth began to develop a strong interest in collecting older items as a child, which eventually led to collecting coins and banknotes during his high school years, and owning a retail business in Hong Kong during the 1990’s. He has been a full-time dealer since 2002 and PCGS, NGC & PMG authorized dealer since 2012. A committee member of the Hong Kong Numismatic Society and Vice Chairman of the Hong Kong Stamp and Coin Dealer Association, Kenneth is the organizer of the Hong Kong International Numismatic Fair (HKINF), which is held each June and December.
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Zach Beasley
Coins

Senior Numismatist
1-800-USCOINS (872-6467)  x1741

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Zach received a BBA in Finance from the University of Wisconsin-Whitewater in 1992. Having worked primarily in the Information Systems field as a network admin or project manager for various firms since graduation, he left the industry to open his own coin dealer business full-time in 2003. Self-taught and specializing in ancient coins, Zach continued to run the business while participating extensively in on-line forums, developing a reputation for meticulous cataloging and research, leading to a position as co-writer for one of the columns in the Celator Magazine. There he received an award in 2005 for "Best Column" from the Numismatic Literary Guild for "The Internet Connection". In 2013, he accepted the position of customer service manager for an on-line website for coin dealers and remained for 4-1/2 years until joining the world and ancient coin department at Heritage. Bringing his enthusiasm for cataloging, Zach greatly enjoys preparing the popular, and growing, weekly internet sessions, as well as the signature auctions, to assist collectors better understand the complex and beautiful arena of ancient numismatics.
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Marc Emory
Coins

Director of European Operations
1-800-USCOINS (872-6467)  Page

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Marc Emory was born in northern Virginia, where he grew up as the son of a Washington correspondent of a newspaper in Upstate New York. A child of the Washington political scene, he was visiting the White House at age 13, and Capitol Hill many times before that. Like so many children of Washington, he attended the Sidwell Friends School. He than was accepted for the Schoolyear Abroad program in Spain, then sponsored by the two Phillips Academies (Exeter, NH and Andover, MA). After the year in Barcelona, he went on to graduate from Andover (1970), and four years later graduated cum laude from the University of Pennsylvania (1974), with a degree in Spanish. He always had an interest in languages, and while at Penn got his introduction to German and Swedish, in addition to continuing his studies in Spanish and Russian from high school. In addition to those four languages plus Catalan, a byproduct of his year in Barcelona, he has since learned French, Italian and Dutch. 

Always interested in collectibles, he was impressed from early childhood by the Smithsonian collections of both coins and minerals, which were within walking distance of his father's office at the National Press Building at 14th and F streets in Washington, D.C. He maintains an extensive collection of minerals at his German home, near the Rheinland city of Dusseldorf, which he shares with his wife of 25 years. His wife, Elisabeth, is a German native, and they speak German at home. Their two bilingual daughters currently attend universities in the United States, after secondary school education in Germany. Marc also has a collection of U.S. coins and an assortment of guitars hand-crafted by legendary luthier Bozo Podunavac. A musician by hobby, he has made recordings and done solo concert tours in his spare time, a commodity which he finds in all too short supply of late.

After graduating from the University of Pennsylvania, Marc joined one of the two firms that later merged in late 1982 to form Heritage. He is has been with the company without interruption since joining in August, 1975. He founded and oversees the operations of the Heritage Overseas offices, which are now in France (since 1979), Germany (since 1979), Switzerland (since 1984), and the Netherlands (since 1990). The Heritage offices in France, Switzerland and the Netherlands are all run by natives of those countries, coordinating in their own languages through Marc at the German office with the Heritage world headquarters in Dallas. The European offices, under Marc's supervision, in turn offer Heritage services to collectors, consignors and estate executors in their own countries and in their own languages, as well as to banks and Central Banks around Europe and the world.

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Todd Imhof
Coins

Executive Vice President - Heritage Auction Galleries
1-800-USCOINS (872-6467)

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Kyle Kavanagh
Coins

Senior Numismatist
1-800-USCOINS (872-6467)  x1156

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Kyle Kavanagh began collecting coins at the age of 12 and has maintained a passion for numismatics ever since.  Originally from New Jersey, he attended Fordham University at Lincoln Center in New York. He graduated in May of 2016 with a B.S. in Psychology and a double minor in Business Administration and Marketing.  While at Fordham, he founded a successful technological salvage business called Vendo Solutions. In the city, Kyle also continued to grow his coin collection, buying coins from all over the Tri-state area.  In his spare time, Kyle enjoys sailing, stock analysis, and quality time with his dog Dante.
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Bob Marino
Coins

Consignment Director & Senior Numismatist
1-800-USCOINS (872-6467)  x1374

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Bob Marino joined Heritage in 1999, managing and developing Internet coin sales, and building Heritage's client base through eBay and other Internet auction Web sites. He has successfully concluded more than 40,000 transactions on eBay. He is now a Consignment Director, assisting consignors in placing their coins and collectibles in the best of the many Heritage venues.
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Nicholas Mathioudakis
Coins

Managing Director
+44 (0)207 493 0498

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Nicholas Mathioudakis has been collecting coins since the age of thirteen. Having lived in Saudi Arabia, he would spend a lot of time roaming the souks in search of hidden treasures where he also bought his first ancient Greek coin. His drive and passion for numismatics led him to take up a full time position at Morton and Eden (formerly associated with Sotheby’s) where he catalogued ancient coins and paper money. Mathioudakis’ areas of expertise include ancient coins, paper money, particularly of the Middle East, European medieval, Islamic and Modern coins. 
Headshot photo of Cale Meier

Cale Meier
Coins

Numismatist
1-800-USCOINS (872-6467)  x1761

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A coin collector and enthusiast from an early age, Cale received his BA in Anthropology, History, and German from the University of South Dakota in 2017. As an undergrad, Cale further developed his knowledge and interest in medieval European and Islamic coins and history, and began to apply the research methods he was learning at college to his personal collection. He also became deeply interested in studying the social functions of coins throughout history, a topic he continues to explore in his free time. Cale joined the Heritage Team full-time in January 2018 as a member of the World and Ancient Coins Department after interning during the end of 2017, and currently enjoys bringing his expertise and curiosity to the department's weekly internet and signature auctions. He is also working to refine his knowledge of Islamic coinage, an area of particular personal interest, to lead that division of the World and Ancient Coins department. His personal collecting interests include principally medieval hammered coinage from Europe and the Islamic world, though his collecting preferences remain quite varied and he is always interested to learn about new areas of coinage.
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Huib Pelzer
Coins

Associate Managing Director, Europe
1-800-USCOINS (872-6467)  E

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At age 12, Huib Pelzer eagerly traded his guitar for three Roman coins of Constantine the Great, marking the start of a lifelong fascination with numismatics and collecting. He earned his degree in social geography from the esteemed Utrecht University in 1992 before starting a travel agency immediately after graduation that specialize in organized tours of the Baltic States and most of Eastern Europe. In 1996, Huib partnered with Jacco Scheper to help lead MPO's expansion into the auction business. 

While specializing in world and ancient coins, fine art and collectibles, Huib's day-to-day responsibilities include managing Heritage Auctions Europe's Amsterdam office and client services and support. He also organizes the office's appraisal days and manages the press. Huib is fully conversant in English, German, Dutch/Flemish and French.
Headshot photo of Jacco Scheper

Jacco Scheper
Coins

Managing Director, Europe
1-800-USCOINS (872-6467)

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Jacco Scheper started collecting coins and stamps in 1977 at the age of 7. After graduating from the famous international Business University Nijenrode in 1991, Jacco held various management positions. In 1996 he and Huib Pelzer acquired coin show organizer MPO, and eventually transformed it into an auction and trading company. MPO held its first auction in 1999. Within a few years MPO became the leading auction house for coins, banknotes and stamps in the Netherlands, and expanded its auction activities to other collectibles from 2011 onwards. In 2015 MPO’s superb reputation for integrity and expertise caught the attention of the owners of Heritage Auctions, which acquired MPO and its entire staff and rebranded it as Heritage Auctions Europe. 

In 2006 Jacco was voted onto the board of the NVMH (Dutch association of Coin Dealers), and elected President of the board in 2009, serving a 6 year term ending in 2012. In 2015 he became President again. Jacco also serves as one of the experts of the NVMH Committee for Numismatic Certification. He also served as a member of the board of SBN (Foundation to Promote Numismatics) from 2006 until 2015, is one of the judges of Krause's COTY (Coin Of The Year – Award), and holds memberships in TMV (Association for Registered Appraisers), Hobéon – recognized – and KGMPK (Royal Society for Coins and Medals).

Jacco is conversant in English, French, Dutch/Flemish and German.

Headshot photo of Jan Schoten

Jan Schoten
Coins

Consignment Director
1-800-USCOINS (872-6467)

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A collector of coins and stamps starting in 1983, Jan and childhood friend Jacco Scheper visited numerous shows together starting in high school. After earning a journalism degree in 1992, he spent seven years in media before volunteering to help with Jacco's new venture at MPO once the company began auctioning in 1999. Jan officially joined the firm in 2001 as a specialist in Dutch medieval, provincial and colonial numismatics and now plays a vital role with the newly formed Heritage Auctions Europe. 

Jan's experience in auctioneering and consigning during his 16-year tenure with MPO has made him an expert on Dutch and European Currency. A member of the NVMH (Dutch Association of Coin Dealers) catalog, he is multilingual in English, Dutch, German and French.
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Idsard Septer
Coins

Consignment Director
1-800-USCOINS (872-6467)

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A 17-year veteran of the Dutch auction scene, Idsard began collecting stamps as a child before also moving onto coins. After graduating in 1998 with a degree in Geophysics and Geography from the Netherlands' prestigious Utrecht University, he joined MPO when the company held its inaugural auction in 1999, and has continued to be an integral member of the firm since. 

A native of Vlissingen, Netherlands, Idsard specializes in stamps, world numismatics, medals and decorative arts. He is multilingual in English, Dutch and German.
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Mark Stephenson
Coins

Consignment Director, Beverly Hills
1-800-USCOINS (872-6467)  x1888

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Mark has been in the coin business for almost two decades and counting. Prior to joining Heritage Auctions, he served for three years as Vice President of Professional Coin Grading Service (PCGS), a position in which he was responsible for client relations and bulk services. He has worked in management, inventory control, operations, shipping and receiving, legal, administrative, accounting, purchasing, sales, grading, and even auction cataloging, in his career in the industry. In his role at Heritage Auctions out of the Beverly Hills office, he is responsible for estate appraisals, wholesale and retail sales, buying collections over email, the phone, and in person, auction consignments, and work at major coin shows. In addition to his experience in numismatics, Mark has practiced law and is a lifelong musician. 
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Max Tursi
Coins

Managing Director
+44 (0)207 493 0498

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Max received an MA in Classics from Universitá degli Studi of Pavia, Italy.  A lifelong coin collector, he has worked for a number of prestigious firms including Christie’s Rome, Astarte S.A. in Lugano, Spink and Son and Classical Numismatic Group in London. Most recently he has been partnered with Mathioudakis at London Coin Galleries Ltd. since 2014. In the last 18 years Tursi has acquired extensive experience in both the retail and the auction world. Focusing mainly on ancient coins, his area of expertise extends to European medieval and modern coins.
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Danny van Doorn
Coins

Manager of Operations
1-800-USCOINS (872-6467)

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Christian Winge
Coins

Numismatist
1-800-USCOINS (872-6467)  x1734

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Christian Winge has had a passion for collecting and studying coins since a very young age growing up in Denmark, his home country. In 1997 Christian moved to the United States and eventually earned a Bachelor of Science degree from Trinity University, where he graduated with dual major in Finance and Economics. While subsequently working in consulting for EMC (now Dell-EMC), and later teaching advanced Economics, he continued to study and trade coins, with a particular focus on 19th century European issues. This continued interest eventually led Christian to the World and Ancient Coins department at Heritage, where he plays an important role in client relations and in building and cataloging major auctions.