I picked up this cruciform socket bayonet at an antique flea market about a month ago for a fairly cheap investment. It caught my interest simply because I was not sure what it was at the time. I just can't help myself when it comes to my habit of acquiring those bayonets that I have never seen before. I remain curious about it as I have not been able to definitively identify it yet. My readings suggested Belgian maybe? So I figure it is time to refer to the true professional collectors, that is you all.
As always, any help is greatly appreciated.