Semi-sheer mid to late 1940s navy rayon dress with futuristic vibes.  It has large off the shoulder lapel details with notched V-neckline, a tiered skirt, and a large cuffs.  At the rear, the tiered skirt ends with a large box pleat, leaving the very back of the skirt unadorned.  There is no lining, just minor facing, giving it its sheer quality.  Metal zipper on right proper side.  Label - By Wilshire of Boston.
 
First image is true color, others have been lightened so you can see the details of the dress.