The antique dealer has given me information that it has tested 12-15k gold. It is an antique ring from the 19th century.
This is the only mark on the ring. This mark is too unfamiliar. If it is a mark of the Polish Convention, would it be added later?
I collect antique jewellery but I am still learning about the marks. I will take photos as much as possible to see if it helps.
Thank you for replying to me. :)