Vintage sweet & delicate white dress

I found this gem in the mid 2000s, when Urban Outfitters still had a real vintage section. I have no idea where it came from, or how old it is, but I’ve tried to take care of it as best I can because it’s so, so lovely. I’d like to pass it on to a loving home. I’ll do my best to answer any questions! -best for sz 0/2 -falls just above the knees (I’m 5’5) -best for small bust -very mild yellowing around armpits and a bit around collar (see photos) -a couple of small stains (again, see photos)