Help identify brooch

Can anyone help me identify this brooch? The marks look like 800, OT and a traingle with maybe a K inside

interesting brooch. can you take a sharper, clearer pictures of the 3 marks and also the pin hinge clasp combo. rest it on a tabletop when you take the picture so no movement.

Clearly Western/rodeo style. Many items like this are made of so-called German silver, but also in other grades of silver alloy. This is not Native American work, and 800 is not sterling.