hallmark in ring | S crown 18 s?

by Rich
(Castlewood VA USA)

What is the item?

Ring

Can you please provide all background information?
Don't know much, after her passing I have been going through some of my mothers things and found what apears to be an old gold wedding band. Don't want to junk it till I'm sure.


What are the markings?
S"Stamp of a crown"18S

Where are the markings?
Inside or ring