Sen-Sen was first made by the T.B. Dunn Company of Rochester, New York in the 1890's. This 3 by 1 inch empty gum wrapper is for the artificial wintergreen flavor, which had met the U.S.P (United States Pharmacopeia) test. The gum was made for a long time, and I do not know its age. On the back customers are asked to send the wrapper with three 2 cent stamps to receive a small aluminum tray so it likely dates from the early 1900's. There is some wear and color loss on the top an b...ottom edges, and the front and back right edges have some insect damage.