Union 70s Gown & Robe

Beautiful Vintage Union made sheer bright orange Fully pleated nightgown- plunge v neck and back - elastic waist - w sheer matching robe w pleated details on sleeve and neck - I see nothing wrong except it was missing a tie on right shoulder I replaced w a orange ribbon - size medium Measurements laying flat - length - 56”. Waist - 13” not stretched up to 30” stretched. collectible garment. 20s 30s 40s 50s 60s ?? Not sure Retro Hollywood glam - movie star - for sure - sexy