| Y | Y | Surcharges on 2¢ Jefferson War Tax Postal Cards in 1920 | ||
| Y | Y | American Heroic Age Polar Expeditions | ||
| Y | Y | WW I German Airship Combat Operations Postal History | ||
| Y | Y | The Leticia Incident | ||
| Y | Y | Burma British Military Administration Stamp Uses June to December 1945 | ||
| N | N | AKA: The Name Changes of a French Colony | ||
| Y | Y | Alfons Stach: WWII Era Czech Stamp Dealer | ||
| Y | Y | German Prisoners of War in Japan - First World War 1914-1920 | ||
| Y | Y | Postal Beachhead Europe: APO 813 | ||
| Y | Y | All Aboard for the Graf Zeppelin's Flight Around the World! |
| Y | Y | Uses of the 20 Cent Transport U.S. Airmail Stamp | ||
| Y | Y | Bosnia's Landscape Series | ||
| Y | Y | The French Post Office in Egypt (1798-1931) | ||
| Y | Y | Japanese American Soldiers in World War II | ||
| Y | Y | Smokes for the Troops: British and Canadian Tobacco Funds in World War I | ||
| Y | Y | Washington & Franklin Coils 1908 Imperforate Issues | ||
| Y | Y | Czechoslovakia's Business Printed Matter Stamps | ||
| Y | Y | The Use of Boston's "PAID in Grid" Cancels: 1851-1859 | ||
| Y | Y | Outgoing Commercial Airmail: from US & Territories, 1922-41 | ||
| Y | Y | Fiji King George VI Definitives 1938-1956 |
| Y | Y | A Brief History of New Zealand Rugby - The ALL BLACKS | ||
| Y | Y | Postal History of WWI Germans and Austrians Interned in British India | ||
| Y | Y | Philatelic Art of Jean-Michel Folon | ||
| Y | Y | The Offset Lithographed Washington-Franklin Heads | ||
| Y | Y | National Park Service Automobile Permit Pasters 1920-1939 | ||
| Y | Y | The 25¢ Niagara Falls Stamp of 1922-38 | ||
| Y | Y | Praga 1978 World Philatelic Exhibition - Showcasing Czechoslovak History & Culture | ||
| Y | Y | Pursuing the Variant: Plating the "Dropped N" Variety on Chile's Second Airmail Etiquette | ||
| Y | Y | Soviet Antarctic Expedition Transcontinental Flights 1961-1967 | ||
| Y | Y | Finding Antarctica - Then Finding More of It |
| Y | Y | U.S. Sesquicentennial Exposition | ||
| Y | Y | Charcot in the Antarctic | ||
| Y | Y | Valid Postage & Mail during German Occupation of Guernsey & Jersey 1940-1945 | ||
| Y | Y | Egypt's First Commemorative Issue 1925 | ||
| Y | Y | US Western Mail Routes - 1848-1865 | ||
| Y | Y | The $5 Hamilton Liberty Series Stamp | ||
| Y | Y | Official First Days of The Czechoslovak Judaica Issue of 1967 | ||
| Y | Y | The 3-cent 'Whooping Crane' Stamp of 1957 | ||
| Y | Y | Pan Am Clippers Conquer the Pacific | ||
| Y | Y | The International Aerogrammes of China (1948-1949) |
| Y | Y | Development and Deployment of the U.S. Atomic Bomb 1942-1945 | ||
| Y | Y | The Dead Presidents' Society 1799-1945 | ||
| Y | N | U.S. Departmentals, 1873-1884 | ||
| Y | Y | The Insurrectionist Issues of Laos from 1961-63 and 1974-76 | ||
| Y | Y | Uses of the 17 Cent Prexie | ||
| N | N | Century of Progress Akron Dispatch | ||
| N | N | Postal Cancellations of Czechoslovak Military in England during WW II | ||
| Y | Y | American Red Cross Abroad: The Great War and Aftermath 1914-1922 | ||
| Y | Y | From Mark of Oppression to Symbol of Gay Pride - The Pink Triangle | ||
| Y | Y | Detecting Reperforated Stamps |
| Y | Y | The Evolution of 'via Siberia' Mail .. 1897-1945 | ||
| Y | Y | Charles Dickinson, Founder of Dickinson Air Line and the First-Which was Their Second to Last-Day of CAM 9 Service from Chicago to Minneapolis-St. Paul in 1926 | ||
| N | Y | The Printings of the First Greek Stamps | ||
| Y | Y | German Field Post Mail During the China "Boxer Uprising", 1900-1901 | ||
| Y | Y | Slave-Related Revenue-Stamped Documents of the Civil War Era, 1862-1872 | ||
| Y | Y | Confederate "Paid" Uses from West Virginia (1861-1864) | ||
| Y | Y | Dutch Postmarks Prior to the Modern Kingdom, 1581-1814 | ||
| Y | Y | T for Taxed: Egypt's 1st Steps into Fiscal Accountability | ||
| Y | Y | German Intervention in China | ||
| Y | Y | Fisherman and Seagull Stationeries Issued for St. Pierre Miquelon 1909-1918 |
| N | N | Mail to and from American Prisoners of War During and after the Korean War | ||
| Y | Y | In Defence of the Border - Canadian Military Mails 1667-1885 | ||
| Y | Y | Butterfield's Overland Mail Company | ||
| Y | Y | Political Prisoners' Mail from the 1848 Paris "June Days Uprising" | ||
| Y | Y | Bureau of Engraving & Printing Repairs on U.S. Stamp Production 1914-The Presidential Era | ||
| Y | Y | Second Bureau's Ugly Duckling: Two Cents Washington Flag, 1903-04 | ||
| Y | Y | An Essay-Proof History for the One Cent Franklin of 1887 | ||
| Y | Y | Great Britian Postal Reform 1837-1840 Pathway to the Penny Black | ||
| Y | Y | Tale of a Crooked Road: The Alaska Highway From Early Promotion to the Opening to the Public | ||
| Y | Y | Twins of the Twentieth Century (1959-2000) |
| Y | Y | Mary Pickford (America's Sweetheart) Film Icon - Entrepreneur - Philanthropist 1909-1979 | ||
| Y | Y | Provisional Issues of South Vietnam (1963-1980), Philatelic Evolution and Uses | ||
| Y | Y | Primary Rate Usages of the U.S. One-Cent Circular Die Postal Stationery | ||
| Y | Y | German Navy WWI Zeppelin L48 | ||
| Y | Y | Introducing the ABNCo Bust of Peace | ||
| N | N | Washington & Franklin Coils: 1914 Rotary Press Issues | ||
| N | Y | Centenary of First Adhesive Stamps | ||
| N | Y | Returning Mail Addressed to Killed or Missing Soldiers in the German Feldpost System, 1939-1945 | ||
| Y | Y | A Penny Saved…Coating Postal Cards for Reuse, 1876-1902 | ||
| Y | Y | Usage History of the "Pumpkin" Envelopes - How and Where They Were Used |