The fact that it has a brass back may just make this one a good one. I can't see some of the other details that differenciate it from the fake civilian decorator buttons, but where is Cannonballguy? He should be able to tell you without even cracking a book. If it had a rusted out iron back, I would have been telling you to go to Jo-Ann's and get some bright shiney new ones for a couple of bucks.