Pretty. I can't see a lot of construction details, but it looks like the seams are serged. . If this were 30s or early 40s, I would expect flat felled or French seams. I would also expect a bit more shape to the body and detailing at the shoulders. Shoulder pads are pretty subtle for full-on 80s, so I would guess 90s. It looks like it might have been a topper for a sleek black party dress.