| United States |
| 1851 Issue (4) |
| 1857 Issue (5) |
| 1861-1866 Issue (15) |
| 1867 Grilled Issue (5) |
| 1869 Pictorial Issue (4) |
| 1870-1871 National Bank Note Co. Issue, I Grill (1) |
| 1870-1871 National Bank Note Co. Issue, without gr (4) |
| 1873 Continental Bank Note Co. Issue, white wove (2) |
| 1875 Reprints of the 1857 Issue (1) |
| 1879 American Bank Note Co. Issue, soft paper (1) |
| 1881-1882 American Bank Note Co. Issue, re-engrave (1) |
| 1887 American Bank Note Co. Issue (1) |
| 1890-1893 Small Bank Notes Issue (1) |
| 1893 Columbian Issue (7) |
| 1894 First Bureau Issue, Unwatermarked (5) |
| 1895 First Bureau Issue, Watermarked (4) |
| 1898 First Bureau Issue, UPU colors (1) |
| 1898 Trans-Mississippi Issue (10) |
| 1902-1908 Second Bureau Issue (5) |
| 1904 Louisiana Purchase Issue (1) |
| 1907 Jamestown Issue (1) |
| 1908-1909 Washington-Franklin Issue, DL wmk, imper (7) |
| 1908-1909 Washington-Franklin Issue, DL wmk, perf (2) |
| 1909 Commemorative Issues (1) |
| 1910-1911 Washington-Franklin Issue, SL wmk, perf (2) |
| 1912 Washington-Franklin Issue, SL wmk, imperf (2) |
| 1913-1915 Panama-Pacific Issue (1) |
| 1916-1922 Washington-Franklin Issue, rotary plate, (2) |
| 1917-1919 Washington-Franklin Issue, flat plate, u (3) |
| 1918-1920 Washington-Franklin Issue, offset, perf (1) |
| 1922-1929 Fourth Bureau Issue (13) |
| 1923 Harding Memorial Issue (2) |
| 1924 Huguenot-Walloon Tercentenary Issue (1) |
| 1925 Lexington-Concord Sesquicentenary Issue (1) |
| 1925 Norse-American Issue (4) |
| 1925-1929 Issues (8) |
| 1929 Kansas-Nebraska Issue (1) |
| 1929-1937 Issues (5) |
| 1930-1939 Issues (3) |
| 1938-1954 Presidential Series (2) |
| 1940-1993 Issues (23) |
| Airmail (17) |
| Errors, Freaks & Oddities (48) |
| Essays & Proofs |
| Printers' Samples (10) |
| Hunting Permit |
| Duck Stamps (6) |
| State Duck Stamps [to sort alpha by state then cat (3) |
| Local (4) |
| Locals and Telegraph Stamps (1) |
| Newspaper (5) |
| Official (10) |
| Parcel Post (2) |
| Post Office Seals |
| Typeset (1) |
| Postage Due (11) |
| Postal Stationery (4) |
| Airmail Postal Cards (1) |
| Postal Cards (3) |
| Postmasters’ Provisionals (3) |
| Registration (2) |
| Revenue (3) |
| Private Die Match (1) |
| Private Die Medicine (3) |
| Proprietary (2) |
| Special Delivery (6) |
| State Revenue (1) |
| Test Stamps and Christmas Seals (1) |
| United States (23) |