Jencek Historical Enterprise, Inc.
Ancient and World Coins

Established on January 1, 2011, Jencek Historical Enterprise, Inc. (JHE) is a corporation that specializes in ancient coins. JHE provides sales, purchases, and appraisals to our customers and represents clients at major auctions throughout the United States and Europe. JHE also provides help to our customers with consignments of their collections. Through our internet stores at and, Jencek Historical Enterprise hosts the largest online search database for Roman Imperial legends as a service to the numismatic community. JHE also holds dealer tables at a number of U.S. coin shows annually and runs online auctions throughout the year.

Jencek Historical Enterprise, Inc. owns and runs the semi-annual San Francisco Historical Bourse ( Established in 2006, this popular biannual show held each May and December specializes in ancient and world coins. The San Francisco Historical Bourse has become popular with collectors and numismatic scholars for its continuing lecture series. Each Friday of the bourse concludes with educational evening lectures for patrons and dealers. In this way, Jencek Historical Enterprise, Inc. remains committed to promoting community support and education of ancient numismatics.

John Jencek is the President of Jencek Historical Enterprise, Inc.  John established himself as a professional numismatist with his own company, John Jencek, in 1997.  John is proud to be known as someone who conducts numismatic business in an ethical and honorable manner. John has always guaranteed the authenticity of all the numismatic material which he has sold or ever will sell. He is currently a member in good standing in the following numismatic organizations: International Association of Professional Numismatists (IAPN), Lifetime Member American Numismatic Society (ANS), Lifetime Member American Numismatic Association (ANA), Lifetime Member Ancient Coin Collectors Guild (ACCG), Royal Numismatic Society (RNS), and the San Francisco Ancient Numismatic Society (SFANS). John is also an active school mentor and donor for Ancient Coins for Education (ACE). Through ACE, John provides lectures about ancient coins at schools and colleges throughout the San Francisco Bay Area. John enjoys actively attending and continuously promoting the hobby of ancient numismatics at six Northern California coin clubs. Having started coin collecting as a hobby in the 1970's, and having attained his degree in computer science, John Jencek understands the role that computers can have in relation to coins. In his new role as President of Jencek Historical Enterprise, Inc., John will continue to enjoy promoting the hobby and academia of ancient numismatics.