Plaster mold for the reverse (back) of a 1982 commemorative medal from the U.S. Capitol Historical Society, which celebrated the 250th anniversary of <a href="https://en.wikipedia.org/wiki/George_Washington" class="extiw" title="w:George Washington">George Washington</a>'s birth on the front, and the 200th anniversary of the <a href="https://en.wikipedia.org/wiki/Great_Seal_of_the_United_States" class="extiw" title="w:Great Seal of the United States">Great Seal of the United States</a> on the back.
U.S. Capitol Historical Society.  The medal was sculpted by Elisabeth Gordon Chandler.
1982
Extracted from PDF version of <a rel="nofollow" class="external text" href="http://diplomacy.state.gov/exhibitions/100935.htm">Commemorating the Seal</a> poster, part of a U.S. Diplomacy Center (State Department) exhibition on the 225th anniversary of the Great Seal.  Direct PDF URL <a rel="nofollow" class="external autonumber" href="http://diplomacy.state.gov/documents/organization/101217.pdf">[1]</a> (33MB)