Markers mark on silver jewelry?

[oddcoins]

Marker's mark on silver jewelry?

Hello!

This necklace belongs to a tenant of mine that wants me to sell it for her on eBay. I told her that I don't know if it sell for more than it's bullion value. I guess we'll see! Over 66 grams of sterling silver!

Can anyone tell me anything about the maker of this piece? Marked STERLING and what looks like "AC" or "AG".

How old is this piece?

 

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[nhbenz]

Alberto Contreras, who started on the 50's, and was at least active until 2008, maybe still.
I initially found an item on eBay with a matching mark, but for better assurance found the Contreras Gallery online to confirm a matching mark.

 

[Mackaydon]

I agree with 'nhbenz'.
The same mark is found at the bottom of this page:
Alberto Contreras Silver Jewelry
Don.......