Pictured above are the first two postage stamps of the United States. Issued in 1847, the 5c stamp depicts Benjamin Franklin because he had been instrumental in setting up this country's postal service. The 10c stamp depicts George Washington. Thomas Jefferson was the next president to appear on a stamp, in 1856.
Now, here's your Final Jeopardy question:
In what year did a president first appear on an American coin?*We will accept a decade, rather than an exact year, but the year was significant in the choice of the president.
* (the question refers to official U.S. currency, not commemorative coins or tokens)
(Answer and explanation in the Comments section)