Richard Byrd Signed Stamp Autographed United States Postal Service 5 Cents JSARichard Byrd American naval officer and explorer signed and authenticated United States Postal Service 5 cent stamp He was a recipient of the Medal of Honor, the highest honor for valor given by the United States, and was a pioneering American aviator, polar explorer, and organizer of polar logistics. Size: 1" x 1" Fully authenticated signature by JSA accompanied by a letter of authenticity No visible handling wear other than paper residue on the back