This medal has been issued with the same basic design elements for several hundred years, and they're
still being made and sold today. As with most religious medals, if there's no maker's name or date in fine print somewhere on the medal, it will probably be very hard to track down the origin of this specific piece.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis