Another one that has me stumped. Sterling Silver earrings 925 K(?)M

I can’t tell if these are Navajo, but think so. But the hallmark is one I can’t identify. Seems I have a number of these lately. Any help would be appreciated. The first one is actually a front of one, back of the other, and the last is the hallmark. Maybe the K is an object?

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<img src=/uploads/db3169/original/1X/710103f226795ab65b7512ad9fe18e4b3fe125e2.jpg">

<img src=/uploads/db3169/original/1X/526e323a3f153d58c223c3a3003d1d2d8bdfd4f7.jpg">

Pretty earrings, can not find anything on that hallmark. They are made using casting techniques and that is why I think the hallmark and 925 are not clear, that is part of the cast, which would most likely make them not Navajo made, thanks for sharing.