Lot of 50 commemorative first day issue stamp envelopes dating from the late 1940s to the early 1960s with themes including:
50th anniversary of the U.S. Air Force (1957)).
Honoring railroad engineers of America (1950).
United Confederate Veterans final reunion (1951).
25th Anniversary of the Mount Rushmore National Memorial (1952).
Honoring the American flag (1957).
Condition Report Very good with minimal signs of wear.