Alexander Graham Bell Telephone Inventor Quotation Postcard

BQ - A unique undated but modern specialist Alexander Graham Bell collectors 6" x 4" postcard where the front features their most famous quotation "When one door opens another opens, but we often look so long and so regretfully upon the closed door that we do not see the one that has opened for us" and reverse has the same quotation over his name, brief details and cover artist to accompany the message & address area making this a truly unique Alexander Graham Bell souvenir unused and mint.