25¢ Nathaniel Palmer
Issue Date: September 14, 1988
City: Washington, DC
Printed By: American Bank Note Co
Printing Method: Photogravure
This stamp is from a block of four issued as a companion to the 1986 Arctic Explorers stamps. The block was issued one month prior to Admiral Richard Byrd's 100th birthday and also honors Nathaniel Palmer, Charles Wilkes and Lincoln Ellsworth.