Vintage 1930's 20's M pastel purple floral sheer gauzy midi dress w/ belt tie

Vintage 1930's 30's 20's M sheer gauzy pastel purple floral midi dress with matching tie belt! Absolutely amazing. Has a double collar. The cream collar is shattered silk and will probably need to be removed and replaced. The lower collar has a crochet floral lace trim. Lower angled waist seam and a lot of seam details down the lower front of the dress. Short sleeves with incredible cutouts. Reminds me of some modern tops. There is browning here and there- see last photo for what it looks like. Held up beautifully in a light vinegar soak. I've not spot treated. This dress is extremely old and antique. I found papers dating 1938, 1931 and 1926. This looks more 20's to me. Happy to answer any questions ♡♡ Measurements: Pit to pit - 19 1/2 inches across. Waist - 18 1/2 inches across. Has matching waist tie to cinch. Hips - 22 1/2 inches across. Length from shoulder to hem - 43 1/2 inches.