Awesome find, I've seen something similiar to that posted here before. Someone will be along to ID it for you. Montana Jim, what is it? Hurry before PBK sees it.
Although I have not seen one of those before, I tend to agree with goldencoin. Before I read his reply I was thinking it may be some type of box plate which was a very common thing on rifle boxes, cartridge boxes, etc.. Its shape tends to lead me away from any uniform badge.