Possible Ring?

[Keith123]

Found this item in the ocean a couple of days ago. At first I thought it was a ring but now I'm second guessing due to how it appears to be constructed. It looks like the there were two tabs with a gap in between them, instead of a complete circle like the average ring. The material appears to be copper or brass but there's a 925 stamp on the inside. I thought silver was stamped 925? Any help with identifying this item and the material would be appreciated!

 

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[firemac]

Silver plated, maybe a toe ring with the opened side.

 

[beerguy]

Some rings are open on the back like that.

Surprising that it was found in saltwater and it is not tarnished black.

Too large for a toe ring...

 

[Icewing]

I see numbers but, not so sure they are 925
Can you double check those numbers please.

 

[Bruce R]

Looks like a ring

 

[Keith123]

I see numbers but, not so sure they are 925
Can you double check those numbers please.

Pretty sure it's 925

 

[jewelerguy]

looks like its got Abalone inlaid in it