Vintage 60s 70s William Pearson Blue Spaghetti Strap Cocktail Dress est. 2

Vintage 60s 70s William Pearson Blue Spaghetti Strap Cocktail Dress est. 2, top of bodice and straps show warming--e.g. pics 4 and 5, made in USA, spaghetti straps, subtle sweetheart neckline, paneled construction fitted bodice, hidden back zip, fitted waist with gathering at bodice and skirt, straight silhouette, paneled construction with front seam hip pockets, lined skirt, dark navy blue lighter weight crepe woven bodice, lighter royal blue stiffer woven skirt, no size marked--please refer to measurements to ensure desired fit, estimated modern 2, no fabric content listed, is likely a rayon blend, 17.5-18" pit to pit, 13-13.25" across waist, 19.25" across hips, 39" shoulder to hem