This is an exquisite vintage 1970's Romantic Victorian style blouse by Gunnies / Gunne Sax by Jessica McClintock.
These early Gunne Sax blouses are a treasure - so detailed and feminine.
Original size tag states size 5. Modern XS. Please check measurements given to best estimate fit. 
34" bust.
Ivory / cream crepe satin with an elegant luster.
Stand up lace collar with lace overlay and ribbon trim.
Sheer tulle front yoke embellished with lace trims, and satin ribbon.
Pearl ball button closure in back.
Wide lace ruffle flounce.
The back yoke is sheer lace, with ruffle flounce.
Long sleeves with puffed caps, with lace & ribbon trim.
Unlined.
Very Victorian or Edwardian! Also perfect for prairie or CottageCore looks.
In flawless, pristine vintage condition
From a smoke-free home.
MEASUREMENTS are approximate. gunne sax tag intact, size was cut out.
Bust 34"
Waist 33
Hip 36
Width at back shoulder 14"
Sleeve length 22.5
Length, back collar seam to hem 22

These look equally chic with jeans, CottageCore prairie skirts, or holiday velvet maxi skirts.