www.925-1000.com

Thanks Dognose,
I did read the posting requirements, but had no way to post an image. So I decided to ask for help just in case someone would recognize the mark. I do sincerely apologize for any inconvenience this may have caused.

Please help......I have purchased an odd piece of jewelry. It is a chain (too large for a bracelet) but beautifully made. My question is...There is a hallmark. A raised oval with the letters "OP" within the oval. Anyone know the who, what, where, (or meaning) of this mark? I have searched ...