US Artillery Button

Federal Artillery Button, eagle with "A", one part convex Robinsons & Jones rm, (20mm.)  Button depicts eagle facing right with "A" in the shield, generally for artillery officers.  Backmark:  "(star) ROBINSONS, JONES & CO (star) / A" rm, between one upper raised ring and two lower, concave back on one piece button, coat size.  One part convex button.