This is an off white satin brocade jacket from China. 
Quite simple with 3/4 length bell sleeves.
The fabric is a beautiful jacquard with images of mountains and botanics
There is a frog at the neck with closes tne jacket by tying the trailing strings.
It also has a hook and eye at the neck
pockets
marked size M but no other labels.
Probably better for a modern size small
Here are the flat measurements, please double where appropriate:
shoulder to shoulder: 15.5"
Armpit to armpit: 19"
Length: 26.5" 
very good condition with some light rust stains as shown .  One is near the hem in the front and one is on the back of one shouldert

Thanks for looking!
#57332