Need Help with Vintage Ring

[trdhrdr007]

I picked this ring up as part of a lot from an estate sale contact. Vintage 14k filigree with a crest on black onyx with seed pearls strung on a wire around the ring. I'm hoping someone can identify the crest. There are Greek letters on the ribbon at the bottom of the crest but I can't make out what they are.

 

[OZARKS]

WOw now THAt is ornate!!! No idea on the crest but I've never seen a ring like that....hope you find answers!

 

[JimDon]

It is in Alpha Tau Omega sorority ring.

 

[trdhrdr007]

It is in Alpha Tau Omega sorority ring. View attachment 1641142

Looks like that's it. Thanks!!