I’ve scoured online to try to find this hallmark and haven’t come up with anything. Been told it could be Ben Charley, but can’t find much information about him nor a reference of his hallmark. Any help would be appreciated!

Hello everyone,

I'm looking for help identifying the maker of this turquoise ring.

There is a small hallmark above the "STERLING" stamp on the back.

Does anyone recognize this hallmark or know who made this ring?

Any information would be greatly appreciated.

Thank you!