During my holidays I got four covers from the USA with nice stamps on the covers and mint stamps inside.
Many mint older US stamps were in the covers. To save time I show all of these together in this post.
75 years Transcontinental Railroad (issued 10-05-1944)
Railroad Engineers of America (issued 29-04-1950)
Everglades National Park (issued 05-12-1947)
Smithsonian Institution (issued 10-08-1946)
Statue of Liberty (issued 24-06-1954)
US Army in Paris (issued 28-09-1945)
Iwo Jima (issued 11-07-1945)
50 years Cinema (issued 31-10-1944)
Friendship with Canada (issued 02-08-1948)
Centenary of the Telegraph (issued 24-05-1944)
Pony Express Rider (issued 03-04-1940)
300 years Settlement of Wisconsin (issued 07-07-1934)
300 years Settlement of Rhode Island (issued 04-05-1936)
150 years Kentucky Statehood (issued 01-06-1942)
250 years Mississippi Territory (issued 07-04-1948)
Indiana Territory Sesquicentennial (issued 04-07-1950)
Texas Centennial (issued 02-03-1936)
Florida Statehood Centennial (issued 03-03-1945)
Texas Statehood Centennial (issued 29-12-1945)
Kearny Expedition (issued 16-10-1946)
Iowa Statehood Centennial (issued 03-08-1946)
Utah Centennial (issued 24-07-1947)
California Gold Centennial (issued 24-01-1948)
Fort Kearny (issued 22-09-1948)
Indian Territory (issued 15-10-1948)
Oregon Territory Centennial (issued 14-08-1948)
Wisconsin Statehood Centennial (issued 29-05-1948)
Centenary of Kansas City (issued 03-06-1950)
Alaska (issued 12-11-1937)
Marquis de Lafayette (issued 06-09-1957)
Arrival of Lafayette in America (issued 13-06-1952)
Thomas Jefferson (issued 16-06-1938)
Betsy Ross (issued 02-01-1952)
Alexander Hamilton (issued 11-01-1957)
150th birthday of Abraham Lincoln (issued 27-02-1959)
Franklin D. Roosevelt (issued 27-06-1945)
Moina Michael, Founder of the Memorial Poppy (issued 09-11-1948)
Women's Right Movement (issued 19-07-1948)
Susan Brownell Anthony (issued 26-08-1936)
Francis Scott Key (issued 09-08-1948)
Wheatland, Home of James Buchanan (issued 05-08-1956)
Joseph Pulitzer (issued 10-04-1947)
Clara Barton, Founder of the American Red Cross (issued 07-09-1948)
International Red Cross (issued 21-11-1952)
Juliette Gordon Low, Founder of the US Girl Scouts (issued 29-10-1948)
Boy Scouts of America (issued 30-06-1950)
Thomas A. Edison (issued 11-02-1947)
Edgar Allan Poe (issued 07-10-1949)
Harlan Fiske Stone (issued 25-08-1948)
Will Rogers (issued 04-11-1948)
Samuel Gompers (issued 27-01-1950)
William Allen White (issued 31-07-1948)
Alfred E. Smith, Governor of New York (issued 26-11-1945)
James Monroe (issued 28-04-1958)
George Washington Carver (issued 05-01-1948)
300 years Volunteer Firemen (issued 04-10-1948)
Veterans of World War II (issued 09-05-1946)
National Guard (issued 23-02-1953)
US Coast Guard (issued 10-11-1945)
United States Sailors (issued 27-10-1945)
Four Chaplains and Sinking SS Dorchester (issued 28-05-1948)
Boulder Dam (issued 30-09-1935)
Religious Freedom (issued 27-12-1957)
American Turners (issued 20-11-1948)
Gold Star Mothers (issued 21-09-1948)
Doctors (issued 09-06-1947)
Rough Riders (issued 27-10-1948)
Grand Army of the Republic (issued 29-08-1949)
USS Constitution (issued 21-10-1947)
Savannah Ship (issued 22-05-1944)
Merchant Marine (issued 26-02-1946)
Thank You very much Sam-Quito!