Hi again,

This is a chain stitch embroidery caftan, probably from the Middle East or North Africa. The stitching looks handmade. The motifs are similar to those used in Turkey, Iran, or Morocco. (Chain stitch embroidery originated in China but spread westward.) The fabric looks like linen from the photographs, but you can check if it is silk using the methods linked to below.

I’ve included links to similar pieces to give you an idea of the market. Prices range; generally higher prices are linked with designer labels or known provenances. My estimate is based on the general prices for antique embroidered caftans.

Silk ID:
https://www.wikihow.com/Determine-if-Silk-is-Genuine
https://blog.jasminesilk.com/how-to-tell-the-difference-between-real-and-fake-silk/

Chain stitch embroidery:
https://en.wikipedia.org/wiki/Chain_stitch

Turkish embroidery, look at motifs
https://www.pinterest.dk/pharyah/turkish-embroidery-pieces-from-bindalli/

Hammer prices of similar garments:
$50
https://www.liveauctioneers.com/item/65653343_moroccan-silk-caftan-1950s
3 for $425
https://www.liveauctioneers.com/item/44568418_three-middle-eastern-silk-garments-1960s-1970s
$175
https://www.liveauctioneers.com/item/44101018_middle-eastern-silk-caftan-gold-thread-in-bag
*$325 for 2
https://www.liveauctioneers.com/item/77683973_one-caftan-and-one-robe-turkey-early-20th-c
$275
https://www.liveauctioneers.com/item/48343510_middle-eastern-silk-and-metallic-caftan-mid-20th-c