I am restoring a Kellogg Wood Wall Phone and this was the final Piece of Major need for the outside of the phone. Still working on the functionality of the item but Earpiece and Mike are both good so that is a start, Am in need of a securing nut or binding post for this as I have an 8/32" threaded bolt coming up to the center, but for the meantime found an aluminum binding post that will work for securing it, would like to get one in brass eventually but it is structurally sound at this time.