Sorry, because I wasn't sure if it was a dress or lingerie I didn't consider the resources outside of the pinked seams info.
Sometimes hard to know where to narrow something when you haven't' seen anything like it before....relative newbie that I am and then of course when things are really well made and unscathed by time, I wonder if it's some re;lica or adapted use/trend based on earlier fashions etc....
Now that I read the resources, it clearly is a dressing gown with that shawl collar.
Thanks for the help.