So there were some questions in the comments about how the jacket was worked. I’m guessing it’s a form of needle-lace/needle-weaving, based on similarity to images in the Encyclopedia of Needlework, by Therese de Dillmont (it’s public domain, so it’s widely available online). Here is a closeup of the insertion work on the jacket:
Now here are some images from the Encyclopedia of Needlework (I’ve linked the pictures to their location in the online book), from the section on needle lace. It’s not an exact match, but it’s similar enough that I suspect you could work out how to recreate the lace in the jacket from the chapter in the book. I’m sure there are entire books on the topic, too. If you know of some even more helpful resources, I’d love it if you commented!