Could be of the time period? Can you tell more? Is it made copper or silver plated?. Look the back over well to see if you can find any makers marks. The style of it looks like it could be a 150 year old metal plate, but they've remade old styles of things like that for a 150 years after the Civil War. From what I see in a picture it looks like old silver plate on copper, but I wouldn't make a bet on just that picture. I believe this item could be solved with just a bit more info. Great find!