And another mystery

Nice little Zia/Sunface pendant but the hallmark is a mystery. It is a circle with some lines, almost like a Sunface. Recognize it?

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Per the website below, the sunface hallmark belongs to Emory Ohmsatte. Doing a reverse search brings up some results that agree with this and some results that show Emory’s hallmark to be “EO” which -per the same website- should be attributed to Ernie Ohmsatte. Hopefully this provides a lead and others with more verifiable resources will chime in here!

I looked at that site but must have looked at the old version. Thanks.