I really just wanted to say that that type of crepe, and the zipper, do indeed look like early 1990s to me. I still have 2 of my Calvin Klein suits from circa 1990 and they have that same crepe and same type zipper too. The length of the dress seems a bit odd for late 80s early 90s', (a bit too long) but that is not necessarily a good indicator I suppose. Are the beads plastic, or are they glass? How are they attached to the dress? And lastly, is the bow original to the dress? Although the bow might be original, it looks all wrong for the rest of dress to me. The beading makes it formal evening wear, but the conservative bow looks like 1960s secretary day wear. The designer kind of mixed up the looks?
Interesting.