Authentic?

Once again I beg the indulgence of the members of this forum to tell me if I have bought some fakes or authentic coins... BTW, I guess these are diobols, not drachm.

 

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I am in no way an expert, and this is far from my collecting area, but I don't see any blatant signs of them being fake.

 

I know these aren't fierce or odd gorgoneions, but are they usual?