This 5 centesimi stamp from the 1867 issue of the Papal States is printed in black on blue paper and features the classic crossed keys and...

This 2 centesimi stamp from the 1868 Papal States series is printed in black on green paper and features the iconic crossed keys and papal tiara,...

This classic 3 bajocchi stamp was part of the inaugural 1852 issue from the Papal States, printed in black on buff-colored paper. It prominently features the...

Issued for the 1933 Chicago World's Fair, this German airmail stamp features the iconic image of the Zeppelin flying over the Atlantic with the overprint "Chicagofahrt...

This 1 Reichsmark red Zeppelin airmail stamp was issued by Germany in 1933 for the Graf Zeppelin’s special flight to the Chicago World's Fair. The overprint...

This artistic souvenir sheet from Ajman features the painting “Sick Boy” by 17th-century Dutch artist Gabriel Metsu. The central image portrays a touching scene of a...

This 4 Reichsmark brown stamp was issued by Germany in 1933 to commemorate the Graf Zeppelin’s flight to the Chicago World’s Fair. Overprinted with “Chicagofahrt Weltausstellung...

This unused postal stationery card from the Kingdom of Serbia features a 5 para red imprint with the profile of King Alexander I Obrenović. Issued around...

This 1 cent green embossed postal stationery envelope from the United States features the profile of Benjamin Franklin and is addressed to Ernest W. Newman in...

This 1877 Italian postal card, denominated 10 centesimi, features a fine portrait of King Umberto I and was postmarked in Ferrara on March 7, 1877. Addressed...

This unused 10 para postal reply card from Serbia was issued under the Universal Postal Union agreement. It features a brown indicium of King Alexander I...

1 cent postal card, issued in the 1870s–80s, features a blue indicium with the profile of Queen Victoria and was used on July 17, 1880. Sent...