A first day of issue envelope for the 1968 Jacques Marquette six cent stamp. This stamp was made to commemorate Marquette’s 300th birthday. The address on the envelope is written in pencil in the lower right corner. The envelope is postmarked, ” Sault Sainte Marie, MI 49783 Sep 20, 1968 .” The number 49783 is the zip code of the post office in Sault Sainte Marie, MI. The upper left side of the card has a picture of Marquette himself. Below him is a little information on him and the purpose of the stamp.