Vintage Gunne Sax by Jessica McClintock prom/party dress

Fabulous red satin vintage dress by Jessica McClintock for Gunne Sax. Crinoline underskirt. Boning at back, sides and front of bodice for support. Tag says size 9 (juniors?) but I think it’s between 2 and 4. Please see measurements. The manikin is size 4 and I could not zip all the way up. 2 very small signs of snags on reverse side of fabric but not noticeable on the front side. And some very faint watermarks near hem but also not noticeable on front side. (See photos)) Pit to pit: 15” flat Waist: 13.5” flat Length: 38” Sweep: 102” approx