- 1923 2¢ George Washington (1723 - 1799), First President of the USA
- 1930 5¢ Postage Due
- 1939 3¢ 25th Anniversary of Opening of Panama Canal
- 1949 3¢ 1st Puerto-Rican Election
- 1950 3¢ The Capitol, Washington, DC - National Capital Sesquicentennial Issue
- 1955 6¢ Theodore Roosevelt (1858 - 1919), 26th president of the USA
- 1957 3¢ Centenary of American Institute of Architects
- 1958 4¢ Lajos Kossuth (1802 - 1894)
- 1959 4¢ 4 Cent Postage Due
- 1959 4¢ 50th Anniversary of Peary reaching North Pole
- 1959 5$ $5 Postage Due
- 1960 1¢ George Washington (1732 - 1799), Firsy President of the U.S.A.
- 1960 4¢ Emplyment of the Disabled Campaign
- 1960 4¢ John Foster Dulles (1888 - 1959)
- 1960 4¢ Tomáš G. Masaryk (1850 - 1937)
- 1960 8¢ Tomáš G. Masaryk (1850 - 1937)
- 1961 4¢ 50th Anniversary of US Naval Aviation
- 1961 4¢ Birth Centenary of Dr James A. Naismith (1861 - 1939)
- 1961 4¢ Nursing
- 1963 1¢ Andrew Jackson (1767 - 1845), Seventh President of the U.S.A.
- 1965 11¢ Centenary of International Telecommuncation Union (I.T.U.)
- 1965 5¢ Archangel Gabriel, 1840 Weather Vane
- 1965 5¢ Traffic Safety
- 1968 10¢ 50-Star Runway
- 1968 6¢ Arkansas River Navigation Project
- 1968 6¢ Flag and White House
- 1968 6¢ Law and Order
- 1968 6¢ Map of the Americas - HemisFair ‘68 Exhibition, San Antonio
- 1972 8¢ Family Planning
- 1973 6¢ Marconi’s Spark Coil and Spark Gap
- 1974 10¢ Birth Centenary of Robert Frost (1873 - 1963)
- 1976 13¢ “Nativity” (John Singleton Copley)
- 1976 13¢ Clara Maass (1876 - 1901) and Newark German Hospital Pin
- 1977 13¢ “Washington at Princeton” (detail) (Peale)
- 1977 13¢ Centenary of Sound Recording
- 1978 13¢ Carl Sandburg (1878 - 1967)
- 1979 15¢ International Year of the Child
- 1979 15¢ John Paul Jones (1747 - 1792)
- 1979 15¢ Tea Caddy
- 1980 15¢ Antique Toys
- 1981 18¢ …For Amber Waves of Grain - Flag and field of wheat
- 1981 18¢ New York University Library by Stanford White
- 1982 20¢ Bighorn Sheep, Ovis canadensis
- 1982 20¢ Maple Leaf and Rose - 50th Anniversary of International Peace Garden
- 1983 20¢ 250th Birth Anniversary of Joseph Priestly (1733 - 1804)
- 1983 20¢ 500th Birth Anniversary of Martin Luther (1483 - 1546)
- 1983 20¢ Niccolini-Cowper Madonna by Raphael
- 1983 20¢ Santa Claus
- 1984 20¢ Ice Hockey - Winter Olympic Games 1984 - Sarajevo
- 1984 20¢ Pacific Calypso, Calypso bulbosa
- 1984 20¢ Spreading Pogonia Orchid, Cleistes divaricata
- 1984 20¢ Wild Pink, Arethusa bulbosa
- 1984 20¢ Yellow Lady’s-slipper Orcid, Cypripedium calceolus
- 1985 44¢ Junipero Serra and Mission San Gabriel
- 1988 25¢ Honey Bee, Apis mellifera
- 1988 E Earth ‘E’ Series
- 1989 25¢ Sleigh Full of Presents
- 1991 29 ¢ Apte Tarpon Fly
- 1993 29¢ Daffodil
- 1993 29¢ Map of Oregon Trail
- 1998 32¢ Yellow Poplar, Liriodendros tulipifera
- 1999 33¢ Hospice Care
- 1999 33¢ Jumping Reindeer
- 2002 34¢ US Military Academy, Bicent.
apr 23 2025 ∞
apr 24 2025 +