www.925-1000.com

https://photos.app.goo.gl/Y8R3mHiYpcNUEZsG7

Let me know if this doesn't work.

I see the stamp <S.D> often on mass produced Irish styled jewelry.
I cannot make out the one symbol.
IRELAND is stamped behind the signet.

please and thank you

I bought this for someone and would like to tell them more about it

Hi and welcome to the forum.

Please embed your picture/s in your post. https://postimages.org is recommended as an image host (after uploading your picture/s click 'Share', then copy and paste the 'Hotlink for forums' code to embed your images). Do not use Photobucket or Dropbox.

Phil

Thank you

I cannot identify SD but the other marks on your ring are: Hibernia symbol of the Dublin Assay Office; 925; Convention Mark allowing the hallmark to be recognised in countries which are signatories to the international convention on hallmarking.

Phil

thanks. We're having a difficult time with S.D. My partner tried contacting one jeweler if she did anything like this in her earlier days, but have not received anything back. I appreciate the clarification of Dublin. That was tricky and we were leaning into Britannia.