Well, I might as well add my two cents... Each of the original buckle manufacturers had a distinct style of eagle that can be easily identified once you learn what to look for. The eagle on this (these) buckles is unlike any of the original eagles that I am familiar with. Also, the details of the rope and lettering is poor in my opinion and if offered any of these buckles I would pass.
As for the current trend of collecting ground dug items, I think that this only makes it easier for fakers to pass off bad items by hiding the flaws in fake buckles by using artificial aging techniques.