The Postal Service issued a nondenominated First- Class Mail definitive Forever Stamp (Liberty Bell) on April 12, 2007, in Philadelphia, Pennsylvania. Carl T. Herrman of Carlsbad, California, designed the stamp.
Unaffected by any future rate changes, the value of the Forever Stamp (Liberty Bell) will always be the First-Class Mail single-piece 1-ounce letter rate that is in effect on the day of use.
The stamp depicts the Liberty Bell, which is perhaps the most prominent and recognizable symbol associated with American independence. Over the years, the historic significance of the bell's message has transcended our national borders, and today the Liberty Bell is an international icon of freedom. The stamp art features a computer-generated image of the Liberty Bell by nationally acclaimed artist Tom Engeman of Brunswick, Maryland. The stamp was issued in the following nondenominated formats: Pressure-sensitive adhesive (PSA) automated teller machine (ATM) sheetlet of eighteen, PSA vending booklet of twenty, PSA double-sided booklet of twenty.
Postal Bulletin (March 29, 2007).