I have three cases with the eagle symbol on the back. Two of them are all leather cases. They have the side flap with two snaps for the flash rail. At bottom center of the back are two snaps that hold the front part of the case on. The eagle symbol is on the main case between these snaps. My third case is also for a side rail camera. It has chrome metal trim around the top and bottom. The flap for the flash rail wraps way around the end of the case and has only one snap in back. The eagle symbol is on the right bottom corner of the back.
Having said all this, I am sorry to have to tell you I don't know anything about the history of the eagle symbol.
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