Grandma's Jewelry Box

While doing some almost-spring cleaning, my mother came across this jewelry box that belonged to my grandmother, Bonnie Mae (Lambertson) Wright (1924-1984).  The box measures about 5 1/2" by 6 1/2".  One of the base legs is missing.  The box is inscribed Omega Nu Tau, which is a sorority to which grandma belonged.  I don't know anything about her involvement with the organization or the significance of the jewelry box.