there was a LOT of that embroidery (and loose fitting, flowy garments ) all over the island of Bali in 1990-92. but, maybe they were inspired by earlier pieces. that embroidery, though, looks nearly exactly like some that was on a jumpsuit that i had from there.
It would help if the photos were the right way up - I think you can edit your post to turn them now - and also help to see the shape, preferably when worn but I agree with Mary. They don't look that old and the techniques are still being used. I've seen similar work on '70-80s garments made for the tourist market in Asia.
