Pre Civil War, c.1830's, artillery militia coat button. The front has a droop wing eagle perched on a cannon next to a stack of cannon balls with CORPS below. This button is listed in Tice as AM209 B1. It has a raised W. H. JONES & CO. . * . EXTRA . * . backmark. The shank is straight. It measures 21 mm in diameter. The mark on the back is not a scuff but a raised line from manufacture. It is gilted over and was something on the button die. The pictures show the details. If you have any questions just send me a message. Thanks, Jim D