| United States |
| 1847 Issue (1) |
| 1851 Issue (10) |
| 1857 Issue (8) |
| 1861-1866 Issue (16) |
| 1867 Grilled Issue (9) |
| 1869 Pictorial Issue (4) |
| 1870-1871 National Bank Note Co. Issue, I Grill (2) |
| 1873 Continental Bank Note Co. Issue, white wove (3) |
| 1887 American Bank Note Co. Issue (4) |
| 1893 Columbian Issue (10) |
| 1894 First Bureau Issue, Unwatermarked (1) |
| 1898 Trans-Mississippi Issue (5) |
| 1901 Pan-American Issue (1) |
| 1902-1908 Second Bureau Issue (4) |
| 1904 Louisiana Purchase Issue (1) |
| 1907 Jamestown Issue (4) |
| 1908-1909 Washington-Franklin Issue, DL wmk, imper (1) |
| 1908-1909 Washington-Franklin Issue, DL wmk, perf (1) |
| 1909 Commemorative Issues (1) |
| 1910-1911 Washington-Franklin Issue, SL wmk, perf (1) |
| 1910-1913 Washington-Franklin Issue, SL wmk, perf (1) |
| 1912 Washington-Franklin Issue, SL wmk, imperf (1) |
| 1912 Washington-Franklin Issue, SL wmk, perf 8½ co (1) |
| 1912-1919 Washington-Franklin Issues (Sc. 409-538a (2) |
| 1913-1915 Panama-Pacific Issue (3) |
| 1913-1915 Washington-Franklin Issue, SL wmk, perf (3) |
| 1916-1917 Washington-Franklin Issue, flat plate, u (1) |
| 1917-1919 Washington-Franklin Issue, flat plate, u (4) |
| 1919-1920 Washington-Franklin Issue, rotary coil w (1) |
| 1920 Pilgrim Tercentenary Issue (2) |
| 1922-1929 Fourth Bureau Issue (10) |
| 1923 Harding Memorial Issue (2) |
| 1924 Huguenot-Walloon Tercentenary Issue (3) |
| 1925 Lexington-Concord Sesquicentenary Issue (3) |
| 1925 Norse-American Issue (3) |
| 1925-1929 Issues (5) |
| 1929 Kansas-Nebraska Issue (2) |
| 1929-1937 Issues (5) |
| 1930-1958 Issues (Sc. 683-1108) (5) |
| 1938-1954 Presidential Series (3) |
| 1971-2007 Error Issues (Sc. 1433-4144a) (25) |
| Airmail (20) |
| Bank Note Company Samples (4) |
| Errors, Freaks & Oddities (2) |
| Hunting Permit |
| Duck Stamps (3) |
| State Duck Stamps [to sort alpha by state then cat (1) |
| Local (1) |
| Newspaper (2) |
| Official (8) |
| Parcel Post (1) |
| Postage Due (3) |
| Postal Stationery |
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| Revenue (1) |
| Beer (1) |
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| Special Delivery (4) |
| U.S. Postal Agency in China (4) |