Maureen thank you for your question. The reason it hasn't been answered before now is because there are too many uncertainties in your ID description - could you please attach a photo of the mark (as close-up as possible) inside the antique wedding ring in a follow-up submission. Please make sure you type "Gold Band 1880-1885" in the subject heading so that we can assign the photo to your post here.
What I can tell you is that your antique wedding ring is marked 18 carat gold. In England BEFORE 1854 "gold" meant HIGH carat gold - 18 karat or better. Not surprisingly, antique wedding rings before 1854 were usually 18 carat gold in Britain, or even higher carat gold. To convert to millesimal value click here.
