First Day Covers (set of 20)

Celebrate a major American postal anniversary with this set of 20 First Day Covers from the U.S. Postal Service. 

Each #6 ¾ envelope bears a different affixed 250 Years of Delivering Forever® stamp canceled with an official First Day of Issue postmark. 

The postmark features the name, date, and location of the stamp issuance in a letter-and-envelope design.