What does this hallmark mean?

[puglady]

I believe the ring itself is pretty old! But I have no idea what the weird upside down both ways S stands for! Thanks

 

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[nhbenz]

Welcome to Treasurenet!
Are there any additional marks, or just the one? It may be of help to add pictures of the whole ring, in case one of the jewelry experts might be able to match up details of it to find another from the same maker. Also, for the same reason, details about it that aren't evident from the photos, for example I wondered about it almost appearing to be hollow, is that correct?

 

[ARC]

Welcome to Treasurenet!
Are there any additional marks, or just the one? It may be of help to add pictures of the whole ring, in case one of the jewelry experts might be able to match up details of it to find another from the same maker. Also, for the same reason, details about it that aren't evident from the photos, for example I wondered about it almost appearing to be hollow, is that correct?

Agreed... And...

It appears to have high copper content... or this is an effect from lighting or camera.

Like Benz suggested / said... more detail and pics needed.

 

[tamrock]

It's a maker's mark of somekind? Hallmarks will tell you metal type and age.