I can't post pics once there is a bid. This pin actuallly might me copper. There is some light scratches on the back that show copper. The pin on the back is shaped like a dome that goes with the curvature of the badge. It looks to be steel. Quite thick and heavy duty, much more so than on a reg brooch or pin. The backing/pin is vertical on the back of the badge.
You can ask a moderator to post pics for you, all of the moderators I have had contact with are more than willing to help out people. try Odysseygal2, she is a sweetheart and always willing to help especially new sellers.
Did you know that the reason cops were called coppers and later cops is because of the copper badges? That's where the name originates...my husband is an investigator. He likes unusual facts like that! lol