I can't see much between the skull and runes- it's right up tight against it- but what is there is a continuation of the oak leaf pattern seen on the rest of the ring- it's definitely an accurate reproduction of the stylized oak leaves on some hr's. I suppose it doesn't look like it because to put a wider more rounded edged "oak leaf" - as we all can picture would make the band wider or the whole leaf design super tiny in its detail. Just imo
