Attractive sepia-toned pinback, measuring approximately 1 1/2" in diameter, picturing an unidentified football team, many in full gear.  Soiling partially obscures the name of the photo studio, a Chicago company beginning with "Amp" printed on the paper backing, the manufacturer of the pinback apparently the "Pin-Lock Button Company," a Chicago company that apparently did business in 1900 only.  VG-EX condition with the aforementioned soiling on the paper backing, some light wear at the curl, and some light oxidation on the pin itself, though the image appears quite strong.