FIRST DAY ISSUE STAMP ENVELOPES - LOT OF 50

Lot of 50 commemorative first day issue stamp envelopes dating from the 1950s and 1960s with themes including:

• Paul Revere (1958)).
• 100th anniversary of the birth of Booker T. Washington (1956).
• Commemorating the world's first communications satellite Echo 1 (1960).
• 150th anniversary of Lewis and Clark expedition (1954).
• Civil War centennial (1961).