If you could see the button better, you might change your mind. When I found it, it was so covered with verdigris that I couldn't make out any detail. Had no choice but to clean it. That is why it appears so bright. It is of old construction, worn, slightly banged up on the edges. No marks of any kind. It is constucted of three parts...a face place with the eagle and anchor, the back plate with the shank, and a collar formed around the two to join them together. Since I had to clean it, it was obviously copper and not brass, but the shank looks brass.