This is different. Usually when an artist dates a piece it is etched instead of stamped because you either have to make the stamp (not a quick process) or you have to order it, which doesn’t make much sense for a year. Do not know the hallmark, and looked in a couple publications and didn’t find anything. What is your history with the ring, purchase date? where did you acquire? any other information would help.
It was purchased in the 80s at a yard sale with a bunch of jewelry. Has much info stamped in it but cant find out what it all means. What would you say the style is?