metal presidents plate

[pattyj]

My father has given me this metal plate that he picked up at a yard sale.  We cannot figure out what it is!!!!!  It peaked his interest when he purchased it because of the words on it and the unique look of it.  This is a thin metal plate that can be bent very easily.  It has 24 small places on it that is indented enough that you now something belongs there. The center of this has the words Presidents United States and the Emblem with the Presidential Eagle.  We thought that maybe it would be for stamps but then we thought maybe for a photo of each president.  Seems like it would be for the first 24 presidents.
Can someone please help me identify this!  Thank you Pattyj   

I have inserted the best image that I can get of this unusual plate. There is not a makers mark on it.