I just got this Grayvik 13oz octagonal in from Harry J Epsteins , if you're not familiar Vaughans sells their blend cheap under the Grayvik brand.
The example HJE pictured had some flashing on the side and was a bit rough.
The hammer I received, well I have no clue what the flaw could have possibly been with this head.

The one thing I noticed is that it's not double step wedged, it's cut across both ways and filled with what I assume is a hard clear epoxy resin of some kind.

I've never purchased a Grayvik hammer before ( bought a bunch of pry bars though ) but I'm guessing this is just how they hang them.
The heads are painted differently, so clearly they're inspected heads before hanging and the defects go into the Grayvik bin.
My assumption is they're saving money by hanging the Grayvik branded heads this way instead of with wedges, and they're probably using the same stuff used to glue the shock blocks into the top of their all steel hammers.
Anyways this is a nice little octagonal faced 13oz claw hammer with a nice octagonal handle.
Normally I don't like curved claw hammers but figured I should have at least one, and could pass this up for $7.