This is the First Day Issue (FDC) of the Alexander Graham Bell Stamp #274 but with the rare cancelation of Montreal + Slogan Cancel SAVE TIME USE AIR MAIL EPARGNEWZ DU TEMPS UTILISEZ LA POSTE AERIENNE on a non philatelic cover. About 96% of the official Bell FDC’s are from Brantford, Ontario. The others are known from the Winnipeg area. We believe that less than 10 are known today with another town like this one. If you know a little bit about the history of the Bell FDC, you know how this commercial FDC cover is rare and in very clean condition.