Vintage long sleeve floral dress black pink yellow peony 60s 70s 16

Gourgeous vintage dress. No brand tags. long sleeve and back slit in dress. zipper back, square ruffle neckline and sleeves. Floral peony print. sticker mark on right shoulder, not sure if it will come out, shown in pictures. labeled a size 16 but vintage sizes are different from modern sizes, so please see measurements in photos.