I have a similar pattern of ring, and have also wondered how old it is. It is a well-known pattern. It seems to be made of silver or something looking very like silver, but there is no discernible mark.

Like Benten's ring here, the band on mine is unusually thick for a ring worn during the Third Reich. It is a small ring; barely fits on my pinky.

Interested in what you guys think.
Cheers,
Stephen