Long purple strapless with beading prom

Jessica McClintock Sz 5 Long purple satin strapless with beading prom dress. Has had a few alterations. A little discoloration under arms. Elastic was run through the top of the back to help keep it up. Fully lined. 100% acetate 47" length side seam 24 inch slit on left side 12" from pit to pit across back. But gathered due to elastic. Elastic could easily be picked out to have more room if needed.