Found this in the attic of a house built a few years before Oklahoma's statehood. Looks old, but also looks like a reproduction of something old. It's at least old enough to be super brittle and has tannin staining on the back where it was mounted to a piece of wood for a LONG time.
Thank you! I've been trying to piece together an old house's history. This certificate may or may not have anything to do with it, but it's definitely an interesting piece of data to add.