German physicist Wilhelm Rontgen is credited as the discoverer of X-rays in 1895 and he gave them that name. One year later this word appears on the front of a brass American flag design which is hinged to a 2-3/8" tall brass stick pin. A tab at the right of the .75" long flag design is released and the front panel springs open. On the left within a keystone is a real photo of Pennsylvania political boss with the text above and below "President/M.S. Quay." To the right is a panel of paper reading "For President, M.S. Quay" with a black wavy line above and below to symbolize X-rays. Four tiny rust marks on the photo and paper caused by the narrow spring wire but still a wonderful piece. Reverse has stamp of Pittsburg maker Heeren Bros. & Co. plus text "Patent Apl'd." Nice luster on the brass. Only example we have seen.