| It's impossible to date the ring by the markings that you've given us because that's just telling us that it's 10% iridium platinum. If I knew more on platinum I might be able to say "Oh, in such a such year, they used 10% iridium platinum a lot," but that's probably not likely anyway.
If you'd like, you can attach a picture of the ring and I'll try my best (no guarantees though, sorry! :-) ) |