copyright © 2006, 2013 Charles Raleigh Porter, III
Great Seal of 1776, reverse side, depicting Moses following pillar of fire, column of smoke, defying Pharaoh, leading Israel out of Egyptian slavery, Pharaoh's army drowning in the Red Sea.
See the following for more about the Great Seal and the 1776 Great Seal Committee:
First Great Seal Committee
Library of Congress