U.S. Mint Stamps by Year

United States #1890 18¢ "Waves of Grain" Mint Single

United States #1927 18¢ Alcoholism Mint Single

United States #1928-31M 18¢ American Architecture Mint Se-tenant Block of 4

United States #1910 18¢ American Red Cross Mint Single

United States #1929 18¢ Biltmore House Mint Single

United States #1933 18¢ Bobby Jones Mint Single

United States #1884 18¢ Brown Bear Mint Single

United States #1934 1981 18¢ Coming Through the Rye Mint Single

United States #1919 18¢ Comprehending the Universe Mint Single

United States #1914 18¢ Cooling Electric Systems Mint Single

United States #1926 18¢ Edna St. Vincent Millay Mint Single

United States #1935 18¢ James Hoban Mint Single