Thanks for the effort Lorraine! I was guessing AR just generally meant non gold. Like a different system of plating or filling. Not sure, but thanks for you're time!Thanx, Wickaboag; I'm supposing that the "GM" is the jeweler, and from my recent research "AR" may be indicative of either Harrison, Arizona, or Jonesboro ,Arizona but I am stumped by the numbers...research turned up nothing ; I'll keep trying to solve this mystery. Lorraine