Limited edition pens are made to commemorate a place, an event or a person.  They are limited to a certain number of pens based on the requirements.

 

The Founding Fathers pen commemorates the signing of the U.S. Constitution.  Current production run is 1,787 pens which is the year the constitution was signed.  The Founding Fathers include the signers of the Declaration of Independence and Signers of the US Constitution.   These pens can be found at the National Constitution Center in Philadelphia, PA.