
it is not a beveled hole...it is a hole that is just not finished yet....most likely pholad borings.
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Now THAT's what I'd call an omarulluk (omar) uncle mac. None of those holes are tapered or even similar to those shown.
I'm not saying they are anything one way or the other, just saying they don't look like any natural hole I have ever seen. I'm just hoping someone that knows more the us here so far will chime in so we can all learn.