Sterling Silver Earrings Onyx Bead Feather Concho 925 Southwest

Concho style with long dangles of silver and onyx with silver feathers. Lovely stamped design on the tear drop conchos. Ok here's what I know about these - I've tried to find the exact same set but there are none. They weigh 16.8 grams.

When I bought these they were sold to me as sterling. They test as sterling but: There are no stamps or marks whatsoever except the fish hooks. Picked them up in Tucson at the gem show many years ago - late 80's. They do have sterling fish hooks that are stamped 925. They measure 3 inches long excluding the fish hooks. I've had them for years but there is no tarnish whatsoever. They were carefully stored and come from old stock - never worn.