Dating this lovely dress

[acceber]

I think this dress might be home made. It barely fit my vintage size 10 dress form. All the seams are pinked and otherwise unfinished. The only closure is that back of the neck pic. The hem is hand sewn. The material is heavy and satiny. No tags or labels. Any idea as to how old? Thank you very much!

 

[Lucybelle]

Try putting it on the form the other way. I suspect the closure goes in front. Are there any bust darts?

 

[acceber]

There are bust darts on the front, opposite side of where the closure is. There is also a vertical fold in the back that resembles a slit but it’s not. I think it’s facing the right way.