10 Cent Jefferson Memorial Stamp Appraisals

Argentine Republic 5 Centavos Stamp, 1915 issue, with Postmark

German Reich 25 Pfennig Philatelic Exhibition Commemorative Stamp

Russian Empire 15 Kopek Postal Stamp (First Romanov Stamp)

Italian 20 Centesimi Postage Due Stamp (Fleur de Lys design)

Antigua 1876 5 Centavos Postage Stamp with Face of Bolivar

Spanish Colonies 5 Centavos Postage Stamp, depicting Christopher Columbus (Colon)

Italian East Africa 7.5 Centesimi Stamp featuring Victor Emmanuel III

Mozambique Company 5 Centavos Airmail Stamp

Colombian 1/2 Centavo Postage Due Stamp - Palacio de Comunicaciones

George C. Marshall Commemorative Stamp

Mexico 1940 Centenario del Primer Timbre Postal Overprint Stamp

French 50 Centimes Commemorative Stamp (Likely Semeuse au Champ type)

Costa Rican National Exhibition 1937 Postage Stamp

Afrique Équatoriale Française 2 Centimes Postage Stamp

Morocco Agencies 15 Centimes George VI and Elizabeth Coronation Stamp

Australia 2 1/2d Centenary of Mitchell's Exploration of Central Queensland Postage Stamp

Australia 1960 Melbourne Cup Centenary 5d Postage Stamps Strip

1939 Baseball Centenary First Day Cover

Robert Millikan Commemorative Stamp

1939 Baseball Centennial First Day Issue Cover

Ecuador 5 Centavos Bicentenario de la Mision La Condamine postage stamp

Collection of Early 20th Century US Postage Stamps on Album Page

Republica de Colombia 20 Centavos Postage Stamp (Waterlow & Sons)

Russian Empire 50 Kopecks Postage Stamp with Inverted Center

King George VI and Queen Victoria 1940 Centenary Stamp

Used 5 (Kreuzer?) Stamp, Orange with Central Cross on Shield

CORREOS MEXICO 5 CENTAVOS Commemorative Stamp: First Printing Press in America

Newfoundland Postage Stamps Collection (1857-1908)

Ecuador 2 Centavos Airmail Stamp, Golden Gate International Exposition 1939

Collection of Early-to-Mid 20th Century Revenue and Definitive Postage Stamps

1939 Cooperstown First Day of Issue Baseball Centenary Stamp Envelope

Russian Zemstvo Stamp, 1 Kopek, 'In aid of soldiers and their families'