Trying to Identify this artist. Please help

Hi, I recently purchased this piece and was told that it is Navajo, possibly from the 1970’s. I’m trying to identify the artist so I can find out the history. Any help would be greatly appreciated.

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Couldn’t find the horse head, maybe do some research on the name Corbet Joe.

I will check it out, thank you. I can’t find anything anywhere with this horse hallmark.