I saw this one on Emedals as well and was excited when I first saw the price until I looked more closely at the pics.
If you look at original sets of oakleaves the flat prong is "butt soldered" to the wreath and the ones I have seen where the prongs are broken they quite often break off leaving a clean, smooth backside to the wreath.
So my concern here is that the wreath had broken prongs and the holes were drilled in it at some point to secure it to the ribbon. Note that it is sewn in 4 places. It is not hard to drill holes in this metal with a small steel twist drill.
The question is whether this was done wartime or not. My bias is that it was not done during war time for the following reason. What would the recipient do with this medal? He would put it on an medal bar in a "court mounted" fashion. If you look, the stitches go through both layers of ribbon so why do that and do it in 4 places if it all has to be taken down to mount it? If I found it like this on a medal bar I would feel much better about it.
Anyway, that is my biased opinion and why I passed on it.