FIRST DAY ISSUE STAMP ENVELOPES - LOT OF 50

Lot of 50 commemorative first day issue stamp envelopes dating from the 1960s and 1970s with themes including:

• Honoring U.S. Servicemen and the Disabled American Veterans Organization (1970).
• 350th Anniversary of The Landing of the Mayflower (1970).
• Fort Snelling (1970).
• Waterfowl Conservation (1968).
• First Man on the Moon (1969).