1950s Backless evening dress little black dress S

This amazing 1950s dress was purchased at an estate sale, is too small for me but I couldn’t leave it behind. This glamorous old Hollywood dress was custom made as it has not maker, content or size tags. I don’t know what the material is! I’m *guessing* some sort of silk or silk blend. Fitted bodice, flowing skirt, amazing open back. Zipper back. Fits my form like a glove. Measurements are taken on the form & are roughly: 25.5” W, 33.5” bust, 37.5” long. Dry cleaned. Pearls, brooch not included.