70’s Black beaded split neck Polyester Tunic

Ok so my fashion crazy 91 year old Mom also loved to shop thrift stores - Before it was fashionable. Her 3 bedroom home closets are packed. She didn’t throw anything out. So be prepared for more as I excavate. Guessing size 10 / Medium. No tags or labels on the shirt. Hem & beads intact. Measurements are on the yardstick in photos.