I am not passing judgment on any of the other rings:

Thru correspondence years ago before there was email [and after] I had learned that one firm made this skull over runes pattern ring, one... That this firm was already making another slightly different pattern due to the visor cap insignia change.. He received a 'cease and desist' letter and both rings were sadly stopped in production immediately! There were no working dies sold to other firms etc. When Hitler came into power[took?] things changed and very quickly.. Anyway, we're getting off topic. It is just my opinion that the ring shown is not an authentic WWII produced ring. My opinion. You all have an opinion and that is mine........... Thank you.., Gaspare