that is not the “Tea Party” flag, that is the Gadsden flag that dates back to 1775
and predating that is this “Don’t Tread on Me” flag - designed by Westmoreland County PA patriots of John Proctor’s battalion, displayed as early as May 1775, and carried into battles of Trenton and Princeton
http://www.newalexpa.com/history3.htm
Westmoreland Co ping!