Thinking very hard of getting this one. Will be my second. It is one of favorite patterns. I do not see anything wrong with it myself.
I see a faint seem at the back and no holes or anything. The stamp looks a bit mushy though.

this pattern you always look at the teeth first. Originals had a lot of detail. Yours look like a fine original.. The content stamp,,,as long as its not cast in good. Even content stamps wore too after not leaving clear impressions.. Good catch!

Very nice. It's good to see authentic skull ring these days. The good ones mostly seem to be hidden in private collections now. Congratulations. A nice partner for your snake and skull ring.

Thanks. As a new collector, this is all quite intimidating although highly interesting.