Pottery Bear with symbols and signed MJ Navajo Who is the artist?

this item is 4 1/2 X 2 1/2 How old is this light weight pottery bear and who is the artist?

I couldn’t find anything on the signature. I don’t know much about this style of pottery. Did find out it is called horse hair and have included a link, https://www.google.com/search?q=navajo+horse+hair+pottery+bear&client=safari&rls=en&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjTjIPhtdrXAhWK54MKHa0dAJQQ_AUICygC&biw=1678&bih=887. I would do some searches and look for a bear that looks similar or a place that sells this style of pottery. Hope this helps.

Thanks Jason, I appreciate your help. Now that I know that the pottery is called horse hair pottery I will be able to search using those key words, Thanks to you, Thanks. Thanks for giving me that interesting link.