A first day of issue envelope for the second 1979 Octave Chanute 21 cent US airmail stamp. This stamp was made as part of the Pioneers of Aviation series of stamps. The envelope is postmarked, ” Chanute, KS 66720 Mar 29, 1979.” The number 66720 is the zip code of the post office in Chanute, KS. The upper left side of the card has a picture of Chanute created by a company called ArtCraft. Below him is a little information on him and the purpose of the stamp.