This document seems to establish a Rebekah Lodge in “Indian Territory”.
To explain further: Oklahoma used to be referred to as Indian Territory before the US decided to once again break their treaties with the native people. Rebekah Lodges are the women’s side of the Oddfellows. The Oddfellows are a fraternal order similar to the Free Masons or the Woodsmen of the World. Many fraternal orders have women’s auxiliaries, the Masons have the Order of the Eastern Star.
I’m not qualified to tell if it’s real or not but it certainly looks like it from the pics.