Nuremberg, as a center of European trade during the Middle Ages and Early Renaissance, was the home of many rechenmeister (or reckonmeister), or reckoning masters. Up through the 17th century, several still used a computing table, or counting board, and counters or jetons (or jettons). Here are some images of computing jetons used during this period. All are made of brass and possess a diameter of approximately 27 mm (just over an inch). The first jeton shown below is identified with the reckoning master Hans Schultes and dated to the period 1553-1584. It contains an image of the Lion of St. Mark, an association with the city of Venice.
![](/sites/default/files/images/upload_library/46/Swetz_2012_Math_Treasures/Misc/Lion-of-St-Mark_UKDFD-545s.png)
The next jeton is associated with the reckoning master Hans Krauwinckel and was used during 1490-1550. The embossed ship design attests to trade and the mathematics applied to it.
![](/sites/default/files/images/upload_library/46/Swetz_2012_Math_Treasures/Misc/Ship-Penny_UKDFD-3499s.png)
The last jeton in this series bears a “rose-orb” design and was used in the period 1586-1635.
![](/sites/default/files/images/upload_library/46/Swetz_2012_Math_Treasures/Misc/Rose-Orb_UKDFD-4333s.png)
Reference: "Nuremberg Jetons," UK Detector Finds Database
The images above have been obtained through the kind cooperation of the UK Detector Finds Database.
For photos of a counting board in a Strasbourg museum, see the Convergence article, "Counting Boards," by Chris Weeks.
Index of Mathematical Treasures
Index of Mathematical Objects