The third US President, Thomas Jefferson, served two terms from March 4, 1801 to March 4, 1809. Previous to that he served one term as Vice-President under John Adams.
Those dates account for half of Thomas Jefferson's time in office. He served as President from 1801-1809.
The Ordeal of Thomas Jefferson - 1954 TV was released on: USA: 28 March 1954
Biography - 1987 Thomas Jefferson Philosopher of Freedom was released on: USA: 21 February 1995
Thomas Jefferson A View from the Mountain - 1995 TV was released on: USA: 26 May 1995
The Cultivated Life Thomas Jefferson and Wine - 2005 TV was released on: USA: 1 November 2005
SMBC Theater - 2009 Thomas Jefferson 3-29 was released on: USA: 22 October 2011
Histeria - 1998 The Thomas Jefferson Program 1-27 was released on: USA: 7 November 1998
I'm not sure where you got those dates, as Jefferson was in office 1801-09. Whatever the case, modern Presidential dollar coins are worth one dollar.
Hawaiian Eye - 1959 Thomas Jefferson Chu 3-5 was released on: USA: 25 October 1961
A-J-'s Time Travelers - 1995 Thomas Jefferson 1-32 was released on: USA: 1995
The dates simply indicate the years Jefferson was President of the US. The first US stamp came out in 1840. There have been dozens of stamps issued with Jefferson on them in many denominations. Consult a catalog to determine which it is. My guess would be that you have Scott Nr. 805 which is worth a few cents.
I speak with them frequently, and from what they tell me, it dates back to when Thomas Jefferson angered them against each other. He possessed my gift.