I have seen a 925 SU mark on several pieces of jewelry-all from different countries (Italy, Mexico, Thailand...). I have some earrings with this mark, but they are so light weight that I doubt they're sterling. Could the SU be indicative of some type of silverplate?
Thanks, Pat and yes the SU is inside a circle. I'll bet you're right about it being an importer or distributor mark since I've seen it on jewelry from several different countries. I appreciate you taking the time! ~Sherry
Thanks, Tom. Hmmm...In my searching I ran across quite a few eBay auctions that listed jewely w/ this same mark as vintage, but of course they may have been incorrect in their assessment. Because of this I thought the mark might be from a company that had been around for awhile. I don't believe my earrings are vintage though, and did not list them as such. Appreciate your response! ~Sherry