r/IsThisSilver

I found this antique napkin ring in a family member’s antique collection.
I cannot find anything to indicate that it is sterling silver, or to indicate what brand it may be. Any identifying information would be appreciated.
There was a purple ribbon that had been wrapped around the bottom and was coming off. Hopefully it was not original but I suppose I may find out lol. But you can see the color difference on the main section between where the ribbon was and where the rest had been exposed

If there is a different reddit thread that may be able to help with identification please let me know too. Thanks in advance :)

I can see it’s Birmingham

However, on the chart it’s telling me it’s antique. And that can’t be right for this piece.

I’m hoping someone with better knowledge could guide me.
Thank you in advance