Vintage Navy Chiffon Dress with Intricate Beading Detail

Vintage navy blue chiffon dress. Excellent condition. Midi length, 48" from shoulder to hem. Intricate beasing around the scoop neck. Back of the dress has a hidden center zipper and keyhole accent with jewel-like button. Pit to pit is 17" and the narrowest part of waist is 15". Size tag says UK12/US 8 but I think it's closer to US 6.