Silver and black dress with rhinestone necklace

It is from the fifties but I don't know exactly what brand the only tag said dry clean only. My grandmother is 104 now and she told me when she bought it but could not remember the exact year. It is beautiful it has a rhinestone necklace attached to it and none are missing. As you can see from the pictures it is more silver on top and black with silver design on the bottom. The dress is made to be a long ankle dress. There is a zipper in the back but also has to very small black hooks at the nec