Here are a proper set of stamps which include a date code..

https://forum.germandaggers.com/ubbthreads.php?ubb=showflat&Number=350643#Post350643

I've collected a little over 40 years,, don't think thats German... Have not seen this pattern ,but not familiar Swedish rings. Small problem is,,,the ring is nice and smooth from wear but the outside hallmarks looks crisp...
You didn't really pay a real lot for it and its a nice looking piece so I'd keep it.. Keep investigating, go on a Silver collectors site and double check the markings etc.

Last edited by Gaspare; 02/27/2022 06:18 PM.