Vintage Mid Century (50s Or‎ 60s (?)) Floral Sheath Dress

GORGEOUS vintage dress. Very Jackie O. The construction of this dress is insane. The inside is as pretty as the outside; hidden zipper detail on the back. There's a floral pattern overlaid with gold thread roses. The gold thread is fraying at the top near the neckline but I think that can be fixed by a skilled tailor. Measurement pictures are provided, as well as pictures of the fraying. THERE IS NO SIZE TAG. I guessed small based on the measurements and the fact that it doesn't fit me. PLEASE LOOK AT MEASUREMENTS OR ASK FOR MORE. The vintage decade is based on what I was told. I have no proof of provenance.