Zum Zum vintage prom gown

Zum Zum vintage prom dress. Periwinkle blue color with sequin embroidery on bodice and sheer panels on bodice, back and hem. Has been professionally hemmed and has minor damage on back hem sheer panel (see in pics). Size isn't listed on tag but I'm guessing a 4/6? Measurements: chest to hem: 49 in. top of strap to hem: 56 1/2in. Pit to pit: 16in. Will need steamed for wrinkles but in really nice shape. Can get more photos or measurements if needed. Open to offers!