I thought I’d solved this! Williamsburg’s jacket and petticoat combination, accession number 1990-10. Here’s why: “East Indian textile, worn in Albany, New York, by Ann Van Rensselaer, ca. 1790, textile earlier in date.”
1790 I can wear at work and at Dress U. That makes it fun and useful, which is always better.
Then I woke up at 2:00AM, with this KCI dress in mind:
That’s a dress style that could be worn with the white Ikea curtain petticoat and kerchief. Now, I’m better at jackets and petticoats than I am at gowns (though isn’t an open robe really just a jacket with a crazy-long skirt?) but I can’t get the KCI gown out of my head. It’s English, too, which makes it plausible, if not as close as the Rensselaer gown. Bonus: have to pattern it up myself, which I enjoy. Just because I’m swearing doesn’t mean I’m not having fun.